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FABACEAE (Leguminosae) LEGUME FAMILY

Martin F. Wojciechowski, except as noted

Annual to tree. Leaf: generally alternate, generally compound, generally stipuled, generally entire, pinnately veined Inflorescence: generally raceme, spike, umbel or head; or flowers 1–few in axils. Flower: generally bisexual, generally bilateral; hypanthium 0 or flat to tubular; sepals generally 5, generally fused; petals generally 5, free, fused, or lower 2 ± united into keel (see 3, Key to Groups, for banner, wings); stamens 10 or many (or [1], 5, 6, 7, 9), free or fused or 10 with 9 filaments at least partly fused, 1 (uppermost) free; pistil 1, ovary superior, generally 1-chambered, ovules 1–many, style, stigma 1. Fruit: legume, including a stalk-like base (above receptacle) or not. Seed: 1–many, often ± reniform, generally hard, smooth.
± 730 genera, 19400 species: worldwide; with grasses, requisite in agriculture, most natural ecosystems. Many cultivated, most importantly Arachis, peanut; Glycine, soybean; Phaseolus, beans; Medicago, alfalfa; Trifolium, clovers; many orns. [Lewis et al. (eds) 2005 Legumes of the World. RBG, Kew] Unless stated otherwise, fruit length including stalk-like base, number of 2° leaflets is per 1° leaflet. Upper suture of fruit adaxial, lower abaxial. Anthyllis vulneraria L. evidently a waif, a contaminant of legume seed from Europe. Laburnum anagyroides Medik., collected on Mount St. Helena in 1987, may be naturalized. Ceratonia siliqua L., carob tree (Group 2), differs from Gleditsia triacanthos L. in having evergreen (vs deciduous) leaves that are 1-pinnate (vs 1-pinnate on spurs on old stems, 2-pinnate on new stems) with 2–5(8) (vs 7–17) 1° leaflets, commonly cultivated, now naturalized in southern California. Aeschynomene rudis Benth. <Noxious weed>, Halimodendron halodendron (Pall.) Voss <Noxious weed> (possibly extirpated), Lens culinaris Medik. are agricultural weeds. Caragana arborescens Lam. only cultivated. Ononis alopecuroides L. <Noxious weed>, Sphaerophysa salsula (Pall.) DC. <Noxious weed> all evidently extirpated. Cercidium moved to Parkinsonia; Chamaecytisus to Cytisus; Psoralidium lanceolatum to Ladeania. —Scientific Editors: Martin F. Wojciechowski, Thomas J. Rosatti.

Key to Fabaceae

LATHYRUS WILD PEA

Kelly Steele & Duane Isely

Annual, perennial herb, unarmed, glabrous or hairy (glandular), generally rhizomed. Stem: sprawling, climbing, or erect; angled, flanged, or winged. Leaf: generally even-1-pinnate; stipules persistent, upper lobe > lower; main axis ending as tendril or short bristle; leaflets ± rolled in bud, 0–16 (if 0, stipules leaflet-like), ± opposite or alternate, linear to widely ovate. Inflorescence: raceme, generally axillary, 1–many-flowered. Flower: upper calyx lobes generally <, wider than lower; corolla 8–30 mm, pink-purple or pale, occasionally white or yellow; 9 filaments fused, 1 free; style ± flat, puberulent near ± middle for ± 1/3–1/2 adaxially. Fruit: dehiscent, oblong, ± flat.
± 150 species: temperate North America, South America, Mediterranean, Eurasia. (Ancient Greek name) Seeds of most alien species. TOXIC to humans, livestock (especially horses). [Broich 2007 Madroño 54:63–71] Some species variable, intergrading with others; some hybridization probable. Lathyrus aphaca L. (leaflets 0, stipules leaflet-like) not naturalized in California.
Unabridged references: [Broich 1987 Syst Bot 12:139–153; Broich 2007 Madroño 54:63–71; Kenicer et al. 2005 Amer J Bot 92: 1199–1209.]

Key to Lathyrus

L. jepsonii Greene
NATIVE
Perennial herb. Stem: climbing, winged. Leaf: stipules small, generally narrow; leaflets 10–16, generally subopposite to alternate, 3.5–5.5 cm, lanceolate or lance-oblong; tendril branched, coiled. Inflorescence: 6–15-flowered. Flower: calyx tube > upper lobes, ± = lower; corolla 15–20 mm, generally pink to pink-purple. Fruit: glabrous.
2n=14. [Online Interchange]

L. jepsonii var. californicus (S. Watson) Hoover
NATIVE
Plant generally puberulent, occasionally glabrous, ± not robust, << 2.5 m.
Forest, open areas; < 1500 m. Klamath Ranges, North Coast Ranges, Cascade Range, n Sierra Nevada, Great Central Valley, Central Western California, Outer South Coast Ranges. Intermediates to Lathyrus vestitus may be hybrids. Apr–Aug [Online Interchange]

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Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on Oct 31 2014
Citation for this treatment: [Author of taxon treatment] 2013. Lathyrus, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=76680, accessed on Oct 31 2014

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click for enlargement Lathyrus jepsonii var. californicus
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2007 Neal Kramer

Geographic subdivisions indicated for the distribution of Lathyrus jepsonii var. californicus Markers link to CCH specimen records. If the markers are obscured, reload the page [or change window size and reload]. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.
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map of distribution 1
(Note: any qualifiers in the taxon distribution description, such as 'northern', 'southern', 'adjacent' etc., are not reflected in the map above, and in some cases indication of a taxon in a subdivision is based on a single collection or author-verified occurence).

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Data provided by the participants of the Consortium of California Herbaria.
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CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa.
Blue line denotes eFlora flowering time.