Vascular Plants of Orange County, California
Compiled by Peter J. Bryant,
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| Dicots | ||||
| Adoxaceae: Elderberry | Aizoaceae: Ice Plants, Fig-marigolds | |||
![]() Blue Elderberry, Sambucus nigra ssp. caerulea |
![]() * Sea-Fig, Carpobrotus chilensis |
![]() * Hottentot-Fig, Carpobrotus edulis |
![]() * Red Iceplant, Malephora crocea |
![]() * Crystalline Iceplant, Mesembryanthemum crystallinum |
| Aizoaceae: Ice Plants, Fig-marigolds (cont.) | Amaranthaceae: Amaranths | |||
![]() * Slender-leaved Iceplant, Mesembryanthemum nodiflorum |
![]() Western Sea-Purslane, Sesuvium verrucosum |
![]() * Rough Pigweed, Amaranthus retroflexus |
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| Anacardiaceae: Sumacs or Cashews. All Southern California members of this family are woody shrubs with milky or resinous sap. Flowers are small; sepals and petals are in 5's on a cup-like dish with 5 stamens and 3 styles. They are insect-pollinated. There is sometimes a disk with nectaries surrounding the base of the ovary (Clarke). Cashews, mangoes and pistachios belong to this family. | ||||
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![]() Laurel Sumac, Malosma laurina |
![]() Skunkbush, Rhus aromatica |
![]() Sugar Bush, Rhus ovata |
![]() Lemonade Berry, Rhus integrifolia |
![]() Western Poison Oak, Toxicodendron diversilobum |
| Anacardiaceae: Sumacs or Cashews (cont.) | ||||
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![]() * Peruvian Pepper Tree, Schinus molle |
![]() * Brazilian Pepper Tree, Schinus terebinthifolius |
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| Apiaceae: Carrots | ||||
![]() * Bur-chervil, Anthriscus caucalis |
![]() * Celery, Apium graveolens |
![]() * Poison hemlock, Conium maculatum |
![]() American Wild Carrot, Daucus pusillus |
![]() * Sweet Fennel, Foeniculum vulgare |
![]() California Sweet Cicely, Osmorhiza brachypoda |
![]() Sharp-tooth Sanicle (Snakeroot), Sanicula arguta |
![]() Pacific Sanicle, Sanicula crassicaulis |
![]() Southern Tauschia, Tauschia arguta |
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| Apocynaceae: Dogbanes (including Asclepiadaceae: Milkweeds). See The Remarkable Bisexual Milkweed Blossom | ||||
![]() California Milkweed (Round Hooded Milkweed), Asclepias californica |
![]() * Tropical milkweed, Asclepias currassavica |
![]() Indian milkweed, Asclepias eriocarpa |
![]() Narrow-leaved milkweed, Asclepias fascicularis |
![]() Milkweed Balloon Plant, Asclepias physocarpa |
![]() Climbing Milkweed, Funastrum cyanchoides car hartwegii |
![]() * Periwinkle, Vinca major |
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| Asteraceae: Sunflowers | Bataceae: Saltworts | Betulaceae: Birches and Alders | Berberidaceae: Barberries | |
![]() (Separate index page) |
![]() Saltwort, Batis maritima |
![]() White Alder, Alnus rhombifolia |
![]() California Barberry, Berberis pinnata |
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![]() Common Fiddleneck, Amsinckia intermedia |
![]() * Pride of Madeira, Echium candicans |
![]() Whispering Bells, Emmenanthe penduliflora |
![]() Thickleaf Yerba Santa, Eriodictyon crassifolium |
![]() Common eucrypta, Eucrypta chrysanthemifolia |
![]() Alkali heliotrope, Heliotropium curassavicum |
![]() Mud Nama, Nama stenocarpum |
![]() Baby blue-eyes, Nemophila menziesii |
![]() Slender pectocarya, Pectocarya linearis ssp. ferocula |
![]() Caterpillar phacelia, Phacelia cicutaria |
![]() Common Phacelia, Phacelia distans |
![]() Wild Canterbury bells, Phacelia minor |
![]() Parry's Phacelia, Phacelia parryi |
![]() Branching phacelia, Phacelia ramosissima |
![]() Tansy phacelia, Phacelia tanacetifolia |
![]() Blue Fiesta Flower, Pholistoma auriyum |
![]() Rusty Popcorn flower, Plagiobothrys nothofulvus |
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| Brassicaceae: Mustards | ||||
![]() * Black mustard, Brassica nigra |
![]() Field Mustard, Brassica rapa |
![]() Sea Rocket, Cakile maritima |
![]() * Shepherd's Purse, Capsella bursa-pastoris |
![]() Milkmaids, Cardamine californica |
![]() Slender-pod jewelflower, Caulanthus heterophyllus |
![]() Tansy mustard, Descurainia pinnata |
![]() * Short-podded mustard, Hirschfeldia incana |
![]() * Lesser wartcress, Lepidium didymum |
![]() Sand peppergrass, Lepidium lasiocarpum |
![]() * Perennial peppergrass, Lepidium latifolium |
![]() Shiny Peppergrass, Lepidium nitidum |
![]() * Garden stock, Matthiola incana |
![]() * Watercress, Nasturtium officinale |
![]() Wild radish, Raphanus sativus |
![]() * London Rocket, Sisymbrium irio |
![]() Lace-pod (Fringe-pod), Thysanocarpus sp. |
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| Cactaceae: Cactuses | Caprifoliaceae: Honeysuckles | |||
![]() Coast Cholla (Coastal Cholla), Cylindropuntia prolifera |
![]() Coast Prickly Pear, Opuntia littoralis |
![]() Oracle Cactus, Opuntia oricola |
![]() Southern Honeysuckle, Lonicera subspicata var. denudata |
![]() Spreading Snowberry, Symphoricarpos mollis |
| Caryophyllaceae: Pinks | ||||
![]() * Windmill pink, Silene gallica |
![]() Fringed Indian Pink (Southern Pink, Mexican Pink), Silene laciniata |
![]() * Corn Spurry, Spergularia arvensis |
![]() * Hairy Sand Spurry, Spergularia villosa |
![]() * Common Chickweed, Stellaria media |
| Chenopodiaceae: Goosefoots | ||||
![]() California Saltbush, Atriplex californica |
![]() Fourwing Saltbush, Atriplex canescens |
![]() Quailbush (Big Saltbush, Brewer's Saltbush), Atriplex lentiformis |
![]() * Australian Saltbush, Atriplex semibaccata |
![]() Spearscale, Atriplex triangularis |
![]() * Five-hook Bassia, Bassia hyssopifolia |
![]() * Lamb's Quarters (Pigweed), Chenopodium album |
![]() California goosefoot, Chenopodium californicum |
![]() * Nettle-leaved Goosefoot, Chenopodium murale |
![]() * Tasmanian Goosefoot, Chenopodium pumilio |
![]() Virginia Pickleweed, Salicornia virginica |
![]() * Russian Thistle (Tumbleweed), Salsola tragus |
![]() Estuary Sea-blite, Suaeda esteroa |
![]() Woolly sea-blite, Suaeda taxifolia |
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| Cistaceae: Rock-roses | Cleomaceae: Capers | |||
![]() * Rock Rose, Cistus sp. |
![]() California Rush Rose, Helianthemum scoparium |
![]() Bladderpod, Peritoma arborea |
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| Convolvulaceae: Morning glories | ||||
![]() Morning Glory, Calystegia macrostegia ssp. |
![]() Field Bindweed, Convolvulus arvensis |
![]() Alkali Weed, Cressa truxillensis |
![]() California dodder, Cuscuta californica |
![]() Western field dodder, Cuscuta pentagona |
| Convolvulaceae (cont) | Cucurbitaceae: Gourds | Cornaceae: Dogwoods | ||
![]() Salt Marsh Dodder, Cuscuta salina var. major |
![]() Canyon dodder, Cuscuta subinclusa |
![]() Wild Gourd (Calabazilla, Coyote gourd), Cucurbita foetidissima |
![]() Wild Cucumber (Manroot), Marah macrocarpus var. macrocarpus |
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| Crassulaceae: Stonecrops | ||||
![]() Pygmy-weed, Crassula connata |
![]() Ladies' Fingers, Dudleya edulis |
![]() Lanceleaf Dudleya, Dudleya lanceolata |
![]() Many-stemmed Dudleya, Dudleya multicaulis |
![]() Chalk Dudleya, Dudleya pulverulenta |
| Datiscaceae: Datiscas. A small family with only 2-4 species. In the U.S. there is only one representative. Its nearest relatives are begonias and gourds. | Ericaceae: Heaths. All members are perennial and include wintergreen, pipe plant, blueberry, cranberry, azalea and rhododendron. Flower structure varies widely within the family with one unique feature; the anthers release pollen from a small pore at the tip rather than through slit openings as in most other families. This pore is often accompanied by a whisker-like appendage that when disturbed by a bee, shakes pollen onto it like a salt shaker (Clarke). The genus Arctostaphylos (Manzanita) has only 2 species in Orange County, but over 38 native to California. They are perennial shrubs in chaparral with smooth, dark chestnut-red stems and branches. The bark exfoliates seasonally. The manzanita leaf-gall aphid (Tamalia coweni) causes numerous conspicuous green or reddish roll galls on the edges of leaves (Clarke). | |||
![]() Durango Root, Datisca gomerata |
![]() Eastwood manzanita, Arctostaphylos glandulosa |
![]() Bigberry manzanita, Arctostaphylos glauca |
![]() Summer Holly, Comarostaphylis diversifolia |
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| Euphorbiaceae: Spurges (Notes on Euphorbias and Chamaesyces) | ||||
![]() California Copperleaf, Acalypha californica |
![]() Rattlesnake weed, Chamaesyce albomarginata |
![]() Small-seeded sandmat, Chamaesyce polycarpa |
![]() * Matted sandmat, Chamaesyce serpens |
![]() California Croton, Croton californicus |
![]() Doveweed (Turkey mullein), Croton setigerus |
![]() * Gopher spurge (Mole plant), Euphorbia lathyris |
![]() * Spotted spurge, Euphorbia maculata |
![]() Cliff Spurge, Euphorbia misera |
![]() Petty Spurge (Cancer weed), Euphorbia peplus |
![]() * Castor-bean, Ricinis communis |
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| Fabaceae: Legumes; Subfamily Faboideae: Five petals, the upper-most (the "banner") being the largest and most conspicuous. There are two side petals termed wings. The two lower petals form the boat-like keel, and are usually fused together at the lower margins (apex). They house the reproductive structures. There is one elongated superior ovary with a curved style. There are nine stamens with fused filaments, and a 10th which is free. Pollinating insects cause the hinged keel to deflex when they land. This exposes the reproductive structures to the underside of the insect, depositing pollen and allowing pollen previously collected to reach the stigma. Leaf-cutter bees (Megachilidae) are among the most frequent pollinators of this subfamily (Clarke p. 228). | ||||
![]() Spanish Clover, Acmispon americanus |
![]() Common Deerweed (California broom), Acmispon glaber |
![]() Small-flowered Lotus (Fishhook Lotus), Acmispon micranthus |
![]() Coastal lotus, Acmispon salsuginosus |
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![]() Strigose Lotus, Acmispon strigosus |
![]() California Lotus, Acmispon wrangelianus |
![]() California False Indigo, Amorpha californica |
![]() Western false indigo, Amorpha fruticosa |
![]() Pomona Locoweed, Astragalus pomonensis |
![]() Ocean Locoweed, Astragalus trichopodus var. lonchus |
![]() Sweet Pea, Lathyrus vestitus |
![]() * Bird's Foot Trefoil, Lotus corniculatus |
![]() Silver Bush Lupine, Lupinus albifrons |
![]() Miniature Lupine, Lupinus bicolor |
![]() Bajada Lupine, Lupinus concinnus |
![]() Bush Lupine (Guard Lupine), Lupinus excubitus var. hallii |
![]() Stinging Lupine, Lupinus hirsutissimus |
![]() Chick Lupine (Valley Lupine), Lupinus microcarpus |
![]() Coulter's Lupine, Lupinus sparsiflorus |
![]() Arroyo Lupine, Lupinus succulentus |
![]() Collar Lupine, Lupinus truncatus |
![]() * Bur-clover, Medicago polymorpha |
![]() * White Sweetclover, Melilotus albus |
![]() * Yellow Sweetclover, Meliotus indicus |
![]() Chaparral pea, Pickeringia montana |
![]() * Spanish Broom, Spartium junceum |
![]() Tree Clover, Trifolium ciliolatum? |
![]() * Rose Clover, Trifolium hirtum |
![]() Maiden Clover (Small-headed Clover), Trifolium microcephalum |
![]() Creek Clover, Trifolium obtusiflorum |
![]() * Red Clover, Trifolium pratense |
![]() Wildcat Clover, Trifolium willdenovii |
![]() American Vetch, Vicia americana |
![]() Winter Vetch, Vicia villosa |
| Fagaceae: Oaks. The Oak family in OC is represented by only one genus, Quercus. They are divided into deciduous and evergreen (or live oak). Acorns produced by the trees are an important food source for wildlife and were a staple food for California Native Americans. Oaks are host to many gall-forming insects. | ||||
![]() Coast Live Oak, Quercus agrifolia |
![]() California Scrub Oak, Quercus berberidifolia |
![]() Canyon Oak, Quercus chrysolepis |
![]() Interior Live Oak, Quercus wislizenii |
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| Frankeniaceae: Frankenias | Garryaceae Monogeneric with 18 species worldwide. Two are found in Orange County. They are evergreen shrubs with opposite leaves, flowers in catkins, and fruit a berry. | Gentianaceae: Gentians | ||
![]() Alkali heath, Frankenia salina |
![]() Pale (Ashy, Yellow-leaf) Silk-Tassel, Garrya flavescens |
![]() Canchalagua, Centaurium venustum |
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| Geraniaceae: Geraniums | ||||
![]() * Long-beaked filaree, Erodium botrys |
![]() * Red-stemmed filaree, Erodium cicutarium |
![]() * White-stemmed filaree, Erodium moschatum |
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| Grossulareaceae: Gooseberries and currants. The family contains only one genus, Ribes, with 7 native species (one with two variants) represented in Orange County. All are generally upright perennial shrubs. Flowers are 5-merous and bisexual; the fruit is a berry. Sepals are petal-like, more prominent than the shorter true petals, which form a cylinder around the stamens and pistil (Clarke, p. 219). The genus Ribes include the currants, gooseberries and many ornamental plants. Gooseberry fruit is bristly, and stems have nodal spines; currants have smooth-skinned fruit and no spines. Flowers have a cup-like hypanthium. | ||||
![]() Bitter Gooseberry, Ribes amarum |
![]() Golden Currant, Ribes aureum |
![]() Hillside Gooseberry, Ribes californicum |
![]() White-flowered Currant, Ribes indecorum |
![]() Chaparral Currant, Ribes malvaceum |
| Grossulareaceae (cont.) | Juglandaceae: Walnuts | |||
![]() Fuchsia-flowered Gooseberry, Ribes speciosum |
![]() California Black Walnut, Juglans californica |
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| Lamiaceae: Mints and Sages | ||||
![]() * Henbit, Lamium amplexicaule |
![]() * Common Horehound (White Horehound), Marrubium vulgare |
![]() Mustang Mint, Monardella breweri ssp. lanceolata |
![]() White Sage, Salvia apiana |
![]() Chia, Salvia columbariae |
![]() Purple Sage, Salvia leucophylla |
![]() Black Sage, Salvia mellifera |
![]() Hummingbird Sage, Salvia spathacea |
![]() Rigid hedge-nettle, Stachys ajugoides var. rigida |
![]() California Hedge-nettle, Stachys bullata |
| Lamiaceae: Mints and Sages (cont.) | Lauraceae: Laurels | Lythraceae: Loosestrifes | ||
![]() Woolly Blue-curls, Trichostema lanatums |
![]() Vinegar weed, Trichostema lanceolatum |
![]() California Bay Laurel, Umbellularia californica |
![]() * Hyssop loosestrife (Grass-poly), Lythrum hyssopifolia |
![]() * Pomegranate, Punica granatum |
| MalvaceaeMallows | ||||
![]() Island Mallow, Lavatera assurgentiflora |
![]() Bush Mallow, Malacothamnus fasciculatus |
![]() * Bull Mallow, Malva nicaeensis |
![]() * Cheeseweed, Malva parviflora |
![]() Alkali Mallow, Malvella leprosa |
| Malvaceae: Mallows (cont.) | Montiaceae: Montias | |||
![]() Few-leaved Checker Bloom, Sidalcea sparsifolia |
![]() Red Maids, Calandrinia ciliata var. menziesii |
![]() Narrow-leaf Miner's Lettuce, Claytonia parviflora ssp. parviflora |
![]() Miner's Lettuce, Claytonia perfoliata ssp. perfoliata |
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| Moraceae: Mulberries and Figs | ||||
![]() White Mulberry, Morus alba |
![]() * Scarlet Pimpernel, Anagallis arvensis |
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MYOPORACEAE: Myoporums | MYRTACEAE: Myrtles |
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| Nyctaginaceae: Four o'clocks | Oleaceae: Olives. There are two native and one uncommon non-native Fraxinus in Orange County (Roberts). In addition we have non-native privet (Lingustrum) species (2) and common olive in the family. Ornamentals in this family include garden lilac (Syringa), Forsythia, fringe-tree and true jasmine. | |||
![]() Red sand verbena, Abronia maritima |
![]() Pink Sand Verbena (Beach Sand Verbena), Abronia umbellata |
![]() Wishbone bush, Mirabilis laevis var. crassifolia |
![]() California Flowering-Ash, Fraxinus dipetala |
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| Onagraceae: Evening Primroses. Four sepals, usually bent downward (reflexed), 4 showy petals, 8 stamens, one pistil and an inferior ovary. (There is only one plant that does not follow this pattern, Ludwigia peploides which has 5 petals, 5 sepals and 10 stamens). The genus Camissonia is told from Oenothera by the stigma and bloom time. Camissonia has a spherical stigma and blooms in morning while Oenothera has a 4-part stigma and blooms in evening. | ||||
![]() Sun Cup, Camissoniopsis bistorta |
![]() Beach evening primrose, Camissoniopsis cheiranthifolia |
![]() Hairy Sun Cup, Camissoniopsis hirtella |
![]() Small evening primrose, Camissoniopsis micrantha |
![]() Strigulose evening primrose, Camissonia strigulosa |
![]() Farewell-to-Spring, Clarkia bottae |
![]() California Fuchsia, Epilobium canum |
![]() Fringed Willowherb, Epilobium ciliatum ssp. ciliatum |
![]() Yellow Water-primrose, Ludwigia peploides |
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| Orobanchaceae: Broomrapes | ||||
![]() Coast Paintbrush, Castilleja affinis ssp. affinis |
![]() Purple Owl's Clover, Castilleja exserta ssp. exserta |
![]() Woolly Paintbrush (Felt Paintbrush), Castilleja foliosa |
![]() Lesser Indian Paintbrush (California Threadtorch), Castilleja minor |
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| Orobanchaceae: Broomrapes (cont.) | Oxalidaceae: Oxalids | Paeoniaceae: Peonies | ||
![]() Salt Marsh Bird's Beak, Cordylanthus maritimus ssp. maritimus |
![]() Dark-tipped Bird's Beak, Cordylanthus rigidus ssp. setiger |
![]() * Creeping wood-sorrel, Oxalis corniculata |
![]() * Bermuda Buttercup, Oxalis pes-caprae |
![]() California Peony, Paeonia californica |
| Papaveraceae: Poppies | ||||
![]() Bush Poppy, Dendromecon rigida |
![]() Golden Ear-drops, Ehrendorferia chrysantha |
![]() California Poppy, Eschscholzia californica |
![]() Small-flowered Meconella, Meconella denticulata |
![]() Coulter's Matilija Poppy, Romneya coulteri |
| Phrymaceae: Lopseed and Monkeyflowers | ||||
![]() Sticky Monkeyflower, Mimulus aurantiacus |
![]() Yellow Monkeyflower, Mimulus brevipes |
![]() Scarlet Monkeyflower, Mimulus cardinalis |
![]() Seep Monkey flower, Mimulus guttatus |
![]() Downy Monkey flower, Mimulus pilosus |
| Plantaginaceae: Plantains | ||||
![]() Twining Snapdragon, Antirrhinum kelloggii |
![]() Violet Snapdragon (Nuttall's Snapdragon), Antirrhinum nuttallianum, ssp. nuttallianum |
![]() Violet Snapdragon (Nuttall's Snapdragon), Antirrhinum nuttallianum spp. subsessile |
![]() Southern Chinese Houses, Collinsia concolor |
![]() Purple Chinese Houses, Collinsia heterophylla |
![]() Parry's Blue-eyed Mary, Collinsia parryi |
![]() Yellow Bush Penstemon, Keckiella antirrhinoides |
![]() Heart-leaved Bush Penstemon, Keckiella cordifolia |
![]() Blue Toadflax, Nuttallanthus texanus |
![]() Scarlet Bugler, Penstemon centranthifolius |
![]() Grinnell's Penstemon, Penstemon grinnellii |
![]() Foothill Penstemon, Penstemon heterophyllus |
![]() Showy Penstemon, Penstemon spectablis ssp. spectabilis |
![]() * English Plantain, Plantago lanceolata |
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| Plantaginaceae: Plantains (cont.) | Platanaceae: Plane Tree, Sycamores | Plumbaginaceae: Leadworts |
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![]() * Common Plantain, Plantago major |
![]() * Water Speedwell, Veronica anagallis-aquatica |
PHILADELPHACEAE: Mock Oranges PHYTOLACCACEAE: Pokeweeds PITTOSPORACEAE: Pittosporums |
![]() Western Sycamore, Platanus racemosa |
![]() California Marsh-rosemary (Sea Lavender), Limonium californicum |
Polemoniaceae: Phloxes. The flowers are 5-merous (5 united petals in a funnel shape, 5 narrow united sepals, 5 stamens with anthers attached to the corolla tube). The superior ovary consists of three fused carpels with a three-part stigma (an unusual number for a dicot). At maturity the seed capsule opens by three valves. California is a center of diversity for this family. |
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![]() Blue False-gilia, Allophyllum glutinosum |
![]() Sapphire Wool Star, Eriastrum sapphirinum |
![]() Los Angeles Gilia, Gilia angelensis |
![]() Globe or Blue-headed Gilia, Gilia capitata |
![]() Bird's-eye Gilia, Gilia tricolor |
![]() Whisker-brush, Leptosiphon ciliatus |
![]() Many-flowered Linanthus, Leptosiphon floribundus |
![]() Flax-flowered Linanthus, Leptosiphon liniflorus |
![]() Coast Baby-star, Leptosiphon parviflorus |
![]() Prickly Phlox, Linanthus californicus |
![]() Ground Pink, Linanthus dianthiflorus |
![]() Hollyleaf Navarretia, Navarretia atractyloides |
![]() Hooked Navarretia, Navarretia hamata ssp. leptantha |
POLYGALACEAE: Milkworts |
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| Polygonaceae: Buckwheats: Subfamily Eriogonoideae (lacking an ocrea) | ||||
![]() Fringed Spineflower, Chorizanthe fimbriata var. fimbriata |
![]() Prostrate Spineflower, Chorizanthe procumbens |
![]() Turkish Rugging, Chorizanthe staticoides |
![]() Long-stemmed Buckwheat (Wand Buckwheat), Eriogonum elongatum |
![]() California Buckwheat, Eriogonum fasciculatum spp. fasciculatum |
![]() Leafy Buckwheat, Eriogonum fasciculatum ssp. foliolosum |
![]() Bluff (Dune, Seacliff) Buckwheat, Eriogonum parvifolium |
![]() Rock Buckwheat, Eriogonum saxatile |
![]() Coast Woolly Heads, Nemacaulis denudata |
![]() Granny's Hairnet (Threadstem), Pterostegia drymarioides |
| Polygonaceae: Buckwheats (cont.): Subfamily Polygonoideae, with an ocrea. | Primulaceae: Primroses | |||
![]() * Willow or Pale Smartweed, Persicaria (= Polygonum) lapathifolia |
* Lady's Thumb, Persicaria (= Polygonum) maculosa (= vulgaris) |
![]() * Curly Dock, Rumex crispus |
![]() Willow Dock, Rumex salicifolius |
![]() Padre's Shooting Star, Dodecatheon clevelandii |
| Ranunculaceae: Buttercups | ||||
| All three species of Clematis are woody perennial twining vines on slopes in chaparral, in foothills and Santa Ana Mountains. They generally have compound leaves with sheaths as the leaf bases, and flowers with many stamens and many pistils. Flowers are generally unisexual, occasionally dioecious (male and female sex organs on different plants). All contain alkaloids that make them unpalatable (Clarke). There are 4 petal-like white or cream sepals ("bracts"; Clarke), and no petals. Fruits are achenes (single seeded fruit produced by a single carpel) with a long feathery style. | ||||
![]() Pipestems, Clematis lasiantha |
![]() Virgin's Bower, Clematis ligusticifolia |
Ropevine, Clematis pauciflora, is most prevalent in sage scrub on dry rocky slopes in the Santa Ana Mountains. It is also a spring-flowering plant with hairless fruit bodies (achenes). Flowers are in clusters of one to three. Sepals are smooth above, hairy below. There are 30-50 stamens; 25-50 pistils. | ![]() Scarlet Larkspur, Delphinium cardinale |
![]() Parry's Larkspur, Delphinium parryi |
![]() Blue Larkspur, Delphinium patens |
![]() California Buttercup, Ranunculus californicus |
![]() Western Buttercup, Ranunculus occidentalis |
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![]() Meadow Rue, Thalictrum fendleri (male) |
![]() Meadow Rue, Thalictrum fendleri (female) |
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| There is a third scarce species of Ranunculus, R. cymbalaria, Desert Buttercup, which occurs along the Santa Ana river and was found at Upper Newport Bay in 1966. | ||||
| Rhamnaceae: Buckthorns. Shrubs or small trees recognized by 4-5-merous flowers, superior ovaries, and stamens that arise from the bases of the petals rather than between them. In families lacking petals, stamens alternate with sepals. The flower receptacles have the appearance of a peace sign when the upper flower parts have fallen. This family is one of only a few non-legumes to have root nodules containing nitrogen fixing bacteria (Clarke). | ||||
| Ceanothus (Wild lilac) occur only in North America with California being the center of distribution. Some species have a unique leaf-vein structure with 3 prominent parallel veins extending from the leaf base to the outer leaf tips. Most are evergreen. Fruits are hard, nut-like 3-lobed capsules. Seeds can lie dormant for hundreds of years and many need fire to germinate. Hybrids are common and difficult to identify. | ||||
![]() Hoary-leaved Ceanothus, Ceanothus crassifolius |
![]() Chaparral Whitethorn, Ceanothus leucodermis |
![]() Bigpod Ceanothus, Ceanothus megacarpus |
![]() Hairy Ceanothus, Ceanothus oliganthus |
![]() Greenbark Ceanothus, Ceanothus spinosus |
| Rhamnus are distinguished from Ceanothus by the soft, berry-like fruit and leaves which have parallel lateral veins extending from a single midrib (Clarke) | ||||
![]() Italian Buckthorn, Rhamnus alaternus |
![]() California Coffee Berry, Rhamnus californica |
![]() Holly-leaved Redberry, Rhamnus ilicifolia |
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| Rosaceae: Roses. One of the most diverse plant families including many ornamentals (roses, pyracantha, etc.) as well as commercially important crops (berries, apples, pears, quince, loquats, apricots, plums, cherries, almonds). Common to this family is a cup-like flower structure called the hypanthium from which the sepals, petals and stamens arise. Flowers are generally 5-merous except stamens which are usually at least twice the number of petals. There are 5 or more carpels or female organs. Leaves are generally alternate with stipules at the leaf base. There are 3-4 major evolutionary lines with divisions based in part on fruit structure and seed dispersal methods (Clarke). | ||||
![]() Chamise, Adenostoma fasciculatum var. fasciculatum |
![]() California or Birch-leaf Mountain Mahogany, Cercocarpus betuloides |
![]() Mesa Horkelia, Horkelia cuneata ssp. puberula |
![]() Toyon, Heteromeles arbutifolia |
![]() Sticky Cinquefoil, Potentilla (=Drymocallis) glandulosa |
![]() Holly-leaved Cherry, Prunus ilicifolia ssp. ilicifolia |
![]() California (Wild) Rose, Rosa californica |
![]() * Himalayan Blackberry, Rubus armeniacus |
![]() California Blackberry, Rubus ursinus |
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| Rubiaceae: Madders. This family contains a few species of economic importance including coffee (Coffea) and quinine (Cinchona). The family is distinguished by having paired seeds and an inferior ovary. Leaves are opposite with stipules that arise between the leaves. The stipules are usually fused, or occasionally leaf-like, like those in local Galium species (Clarke). Erect to rambling with slender stems that often form a tangled mass or intertwine with other shrubs. The native species' plants are either male or female (dioecious) while the exotic G. aparine is bisexual. Leaves appear to be whorled but there are only two true leaves at each node. The other structures are modified stipules. In all but one species, flowers are 4-merous, and lack a calyx. Members of this genus were once used in curdling milk (Clarke). | Rutaceae: Rues | |||
![]() Common Bedstraw, Galium aparine |
![]() Narrow-leaved Bedstraw, Galium angustifolium |
![]() Climbing Bedstraw, Galium nuttallii spp. nuttallii |
![]() Climbing Bedstraw, Galium sp. |
![]() Bush Rue, Cneoridium dumosum |
| Salicaceae: Cottonwoods and Willows. This family includes cottonwoods (Populus) and willows (Salix), both indicators of the riparian woodland plant community. Cottonwoods are large trees while willows range from medium sized trees to shrubs. Leaves are deciduous, simple and alternate. All are dioecious with male and female flowers appearing on different plants as elongate catkins, aggregates of pollen or seed-bearing flowers. The staminate (male) flowers have 2-10 stamens; pistillate (female) flowers have 2 fused pistils; neither have a calyx or corolla. Cottonwood seeds have larger more spherical capsules which open by 3 valves while willow capsules are small and slender, splitting into two valves. The minute seeds with long silky tails that help in wind dispersal. Some species shed large amounts of cottony seed masses. Salix can also be insect pollinated. Hybrids among Salix are common, making identification difficult. Populus are differentiated from Salix by leaf shape, bract segments, and number of stamens on male plant (8-60 in Populus vs. 2-10 in Salix). | Sapindaceae: Maples | |||
![]() Fremont Cottonwood, Populus fremontii ssp. fremontii |
![]() Narrow-leaved Willow (Sandbar Willow), Salix exigua |
![]() Black Willow (Goodding's Willow), Salix gooddingii var. variabilis |
![]() Arroyo Willow, Salix lasiolepis |
![]() Big-leaf Maple, Acer macrophyllum |
Saxifragaceae: Saxifrages. All are perennial herbs, generally with 5-merous flowers and two ovules in a cup-like structure from the edge of which arise the sepals, petals and stamens. |
Scrophulariaceae: Figworts | |||
![]() Yerba Mansa, Anemopsis californica |
![]() Parry's Jepsonia (Coast Jepsonia), Jepsonia parryi |
![]() Woodland Star, Lithophragma affine ssp. mixtum |
![]() Micranthes (Saxifraga) californica |
![]() California Figwort (Bee Plant), Scrophularia californica |
| Solanaceae: Flowers in this family are generally 5-merous with a superior ovary. Fruits range from berries to dry capsules. Most members of this family are susceptible to a root knot nematode (Meloidogyne), and many are larval foodplants for the tomato hornworm (Hummingbird Hawk Moth, Manduca quinquemaculata) (Clarke). | ||||
![]() Jimsonweed (Tolguacha), Datura wrightii |
![]() California Boxthorn, Lycium californicum |
![]() * Tree Tobacco, Nicotiana glauca |
![]() Indian Tobacco, Nicotiana quadrivalvis |
![]() Thick-leaved Ground-cherry, Physalis crassifolia |
| Solanaceae (cont.). Genus Solanum, the nightshades. This large genus includes edible plants such as tomato, potato and eggplant, but the foliage and unripe fruits of many others are poisonous to humans. As in most of this family, flowers are 5-merous, but they are distinguished by anthers which are pressed tightly together with 2 pores at the tip. Pollen is released from these pores in response to vibration. Bumble bees (but not honey bees) vibrate their bodies thereby more effectively releasing the pollen. The ability to "buzz pollinate" is one reason that bumble bees are used commercially to pollinate hothouse tomatoes. | Ulmaceae: Elms | |||
![]() * Small-flowered (White) Nightshade, Solanum americanum |
![]() Douglas' Nightshade, Solanum douglasii |
![]() Purple Nightshade, Solanum sp. |
![]() * Garden Nasturtium, Tropaeolum majus |
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| Urticaceae: Nettles. Stinging hairs (trichomes) are diagnostic of nettles. Skin contact should be avoided with them. Tiny, inconspicuous flowers in axillary clusters are unisexual, the taminate (male) flowers with 4 sepals, no petals, 4 stamens; pistillate (female) flowers with 4 unequal sepals, no petals, 1 superior ovary. The fruit is an achene enclosed by the persistent sepals. Most members of this family grow in rich moist soils. The edible, nutritious, greens lose their sting when boiled or dried and pulverized (Clarke). | Verbenaceae: Vervains. Most closely related to the mint family with opposite leaves and square stems. Well known members include Lantana, and Teak (Tectona grandis), an important tropical hardwood (Clarke). | |||
![]() Western Nettle (Annual Stinging Nettle), Hesperocnide tenella |
![]() Hoary (Stinging) Nettle, Urtica dioica ssp. holosericea |
![]() * Dwarf Nettle, Urtica urens |
![]() Turkey-tangle Frog-fruit, Phyla nodiflora var. nodiflora |
![]() Western Verbena, Verbena lasiostachys var. lasiostachys |
| Valerianaceae: Valerians | Violaceae: Violets (Not shown here yet, Viola sheltonii is in upper Silverado Cyn, Modjeska Peak and nw slopes of Santiago Peak. It has lobed leaves). | Viscaceae: Mistletoes. This family consists of perennial hemi-parasites with inconspicuous flowers. Each parasite is selective of its host. Foliage is thick, semi-succulent and usually evergreen. Sustenance is derived from the host tree's xylem sap, water and minerals absorbed from its roots, which the mistletoe, which has its own chlorophyll, then uses to convert sunlight to carbohydrates by photosynthesis. | ||
![]() California Golden Violet (Johnny-Jump-up), Viola pedunculata |
Oak Yellow Violet, Viola purpurea ssp. quercetorum |
![]() Hairy (Oak) Mistletoe, Phoradendron serotinum ssp. tomentosum |
![]() Big-leaf (Sycamore) Mistletoe, Phoradendron serotinum ssp. macrophyllum |
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| Vitaceae: Grapes | Zygophyllaceae: Caltrops | |||
| Monocots | ||||
| Agavaceae: Agaves. There are three groups in OC, two non-native Agaves, two Chlorogalums, and Hesperoyucca. Agavaceae are perennial, from bulbs or rhizomes. Flowers are bisexual with 6 perianth parts (collective term for petals and sepals or tepals of a flower; from peri = around, anth = anthers. Clarke), in two petal-like whorls. There are 6 stamens often with wide, succulent filaments. | Alismataceae: Water plantains |
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![]() Small-flowered Soap Plant, Chlorogalum parviflorum |
![]() Wavy-leaved Soap Plant, Chlorogalum pomeridianum |
![]() Chaparral Yucca, Hesperoyucca whipplei |
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| Alliaceae: Onions and relatives. Long-lived perennials that grow from a bulb, and may reproduce either by seed or bulb division which can lead to dense clonal clusters. Leaves are basal with a typical onion smell when crushed; bulbs are edible. There are 2-4 thin, dry bracts. Flowers are in compact umbels on tall leafless stems (pedicels); 6 petal-like perianth parts with darker midvein; 6 stamens fused at the base; a 3-lobed superior ovary with a nectary beneath that produces copious nectar, hidden by the stamen bases. Each ovary lobe in the flower center has two ridges. | ||||
![]() Red-skinned Onion, Allium haematochiton |
![]() Early Onion, Allium praecox |
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| APONOGETONACEAE: Cape pondweeds |
ARACEAE: Arums | Arecaceae: Palms | Asphodelaceae | |
![]() California Fan Palm, Washingtonia filifera |
![]() * Onionweed, Asphodelus fistulosus |
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| COMMELINACEAE: Spiderworts |
CYMODOCEACEAE: Manatee grasses |
Cyperaceae: Sedges and rushes: Grass-like herbs with 3-sided, pithy, stems (not hollow as in grasses) that grow in marshy or moist areas. Leaves are in basal whorls and can be keeled or cylindrical. Inflorescences generally consist of a tight cone-like whorl near the tip of the flowering stem. Perianth parts are either absent or bristle-like. Fruit is a single seed. | HYDROCHARITACEAE: Waterweeds |
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![]() Southern (California) Bulrush, Schoenoplectus californicus |
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| Iridaceae: Irises. | Juncaceae: Rushes. In our area, the family is represented by only one genus, Juncus. Rushes are mostly perennials with basal leaves vertical, hollow, cylindrical to flattened, on an erect stem, and with 3-merous, green to brown flowers. They arise from rhizomes (clone-forming stems) in water or moist soil. The flower produces a 3-parted fruit capsule. In rushes, the basic flower structure is nearly the same as in Liliaceae, but the reduced perianth parts (tepals) are very small and bract-like, occurring in terminal, head-like clusters. (In Cyperaceae (sedges), flowers have no perianth parts, but instead have bracts. Cyperaceae are intermediate in evolution beween rushes and grasses. In many cases, non-flowering plants in Cyperaceae are virtually indistinguishable from those of Juncaceae, suggesting a close relationship, supported by recent molecular work). (Clarke p. 36) | JUNCAGINACEAE: LEMNACEAE: |
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![]() Blue-eyed Grass, Sisyrinchium bellum |
![]() Spiny (Sharp-leaved) Rush, Juncus acutus ssp. leopoldii |
![]() Baltic Rush, Juncus balticus ssp. ater |
![]() Panicled Rush, Juncus phaeocephalus, var. paniculatus |
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| Liliaceae: Lilies. Perennials growing from a membranous bulb or scaly rhizome. Our genera arise mainly from bulbs, have narrow leaves with parallel veins, flowers arranged in threes or sixes, superior ovary, capsular fruits with wind-dispersed seeds and large conspicuous flowers. Many species are poisonous, especially to cats; the group includes widely grown ornamental plants (hyacinths, tulips, lilies). It is estimated that the family evolved 58 million years ago (Wikipedia). Calochortus is the most widely dispersed genus in the family, endemic to the Pacific coast of North America. California has 28 endemic species, with 6 species present in Orange County. The genus includes Mariposa lilies, Globe lilies, and Fairy lanterns. Calochortus produce showy flowers on an erect stem that arises from a 2 cm. bulb in spring. Unlike most other lilies, 3 wedge-shaped petals differ in color from their smaller lance-shaped sepals. The insides of the petals are often hairy with nectaries near the base. There are 6 filaments, often dilated at the base, anthers attached at the base, one style, three stigmas and a superior ovary. The fruit is a 3-chambered capsule. The bulbs of many species were eaten by Native Americans. | ||||
![]() Catalina Mariposa Lily, Calochortus catalinae |
![]() Splendid Mariposa Lily, Calochortus splendens |
![]() Intermediate Weed's Mariposa Lily, Calochortus weedii var. intermedius |
![]() Weed's mariposa lily, Calochortus weedii var. weedii |
![]() Plain Mariposa Lily (Shy Mariposa Lily), Calochortus invenustus |
![]() Chocolate Lily (Mission Bells), Fritillaria biflora |
![]() Humboldt Lily, Lilium humboldtii ssp. ocellatum |
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Orchidaceae: Orchids: One of the two largest plant families (along with Asteraceae), with up to 25,000 currently accepted species, but most are tropical and only four species are native to our area, two uncommon and two very rare. All orchids are herbaceous perennials that are often long-lived. Most tropical forms grow nonparasitically on trees while temperate species including all California species are usually terrestrial. In California native orchids, nutrition is derived from association of roots with fungi in non-green species, and from rhizomes or tubers with fleshy roots in green plants. Flowers are on spikes, with each flower subtended by a bract. Flowers are bisexual, rotating 180 degrees in bud and turning upside down. There are generally 3 petal-like sepals, one central, erect and two lateral; 3 petals, the lowest called the lip differs from the others; one stamen, fused with the style and stigma into a column. Pollen confined to sacs (pollinia), not freely dispersed, but removed intact on the body of the pollinator; ovary inferior, stigma 3-lobed, under the column tip. Fruit is a capsule, with numerous minute seeds (JM2). |
Ruscaceae: Butcher's Brooms | |||
Cooper's Rein Orchid, The most commonly encountered Rein Orchid in the County. This orchid grows under other plants so it is difficult to find. It grows in dry soils on hillsides in coastal sage scrub and oak woodlands in Limestone, Santiago, Silverado, Trabuco, and San Juan Canyons, also along San Juan Loop Trial and both ends of the San Juan Trail. Peak flowering is in late April and early May. |
Wood Rein Orchid, Two Orange County populations: in upper Trabuco Canyon and a smaller one in Silverado Canyon. It is in mixed coniferous forest under the shade of big-cone Douglas firs and California Bay Laurel. It blooms in May-July. |
Thin Wood Rein Orchid, Very rare and difficult to find. It was found only once on a steep slope in Holy Jim Canyon at 2000 ft. in 1948. |
![]() Chaparral Nolina, Nolina cismontana |
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| POACEAE: Grasses |
PONTEDERIACEAE: Pickerel weeds |
POTAMOGETONACEAE: Pondweeds |
SCHEUCHZERIACEAE: Scheuchzerias |
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| Themidaceae. Perennial herbs arising from a starchy corm, a new corm arising each year from the old one. Leaves are linear, parallel-veined, often fleshy, forming a closed sheath at their base. The inflorescence is umbel-like, (flat- or convex-topped, with all flower stalks attached to a central point (umbrella-like) rarely a single flower, at the apex of a leafless stem (scape). Flowers are bisexual. Perianth parts (sepals and petals) are undifferentiated ("tepals"), arranged in 2 whorls of 3. Either 6 fertile stamens or 3, sometimes alternating with 3 staminodes (sterile or rudimentary stamens) inserted on tepals. Ovary superior and 3-chambered. Fruit a capsule (Wikipedia). | ||||
![]() Golden Stars (Common Goldenstar), Bloomeria crocea |
![]() Thread-leaved Brodiaea, Brodiaea filifolia |
![]() Brodiaea terrestris |
![]() Blue Dicks, Dichelostemma capitatum ssp. capitatum |
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| Typhaceae: Cattails. Tall monoecious perennial herbs from creeping rhizomes that grow deep in mud. Cylindrical, jointless stems are submerged at the base. Leaf blades are C-shaped in cross section at the base, flat above, alternate, thick and spongy with large internal air cavities. Flowers are unisexual, wind pollinated, with over a thousand densely crowded on a terminal unbranched spike, the male (staminate) above, the sausage-like female (pistillate) below; there are no petals. Staminate flowers mixed with papery scales (bracts) have 2-7 stamens on slender filaments; flowers wither once pollen is shed. Tiny fertile pistillate flowers on long, hairy stems have an ovary narrowed into a persistent style and narrow stigma; many modified pistils have an enlarged, terminal, sterile ovary and deciduous style (JM2). Fruits tightly compressed on spike, dry; when ripe, heads disintegrate into loose cottony fluff, the seeds fall free or becomes airborne. The vegetation is an important food source for migratory ducks. Rhizomes are edible with as much starch content as corn. Evidence on grinding stones suggest these plants were eaten by humans in Europe as long as 30,000 years ago. The spread of Typha is an important part of the process of open water bodies being converted to vegetated marshland and eventually dry land. Other uses. | ZANNICHELLIACEAE: Horned pondweeds |
ZOSTERACEAE: Eel grasses |
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![]() Southern Cattail, Typha domingensis |
![]() Broad-leaved Cat-tail, Typha latifolia |
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Non-vascular Plants of Orange County, California, by Peter Bryant Lathrop, E.W. & R.F. Thorne. 1978. A Flora of the Santa Ana Mountains, California. An annotated list of the vascular plants and the plant communities of the Santa Rosa Plateau, Santa Ana Mountains. Aliso 9(2):197-278. [Available from Rancho Santa Ana Botanic Garden]
Roberts, F.M., Jr. 1998. A Checklist of the Vascular Plants of Orange County, California, second edition. F.M. Roberts Publications, Encinitas, CA. Available from the OC chapter of the California Native Plant Society, which meets in the Duck Club building next door to Audubon House. Roberts, F.M., Jr., S.D. White, A.C. Sanders, D.E. Bramlett, & S. Boyd. 2004. The Vascular Plants of Western Riverside County, California:
An Annotated Checklist. F.M. Roberts Publications, San Luis Rey, CA. [The OC/Riverside County line runs along the ridgeline of the Santa Ana Mountains, so one needs this reference for the northeast side of the range. Available from the OC chapter of the California Native Plant Society.
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