Jepson Flora Project: Jepson Interchange    

 
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Jepson Interchange (more information)
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  • Up-to-date information about California vascular plants is available from the Jepson eFlora.

FABACEAE

LEGUME FAMILY

Annual to tree
Leaves generally compound, alternate, stipuled; leaflets generally entire
Inflorescence: generally raceme, spike, umbel or head; flowers sometime 1–2 in axils
Flowers generally bisexual, generally bilateral; hypanthium generally flat or cup-like; sepals generally 5, fused; petals generally 5, free, or the 2 lower ± fused; stamens 1–many, often 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, sometimes including a stalk-like base above receptacle, dehiscent, or indehiscent and breaking into 1-seeded segments, or indehiscent, 1-seeded, and achene-like
Seeds 1–several, often ± reniform, generally hard, smooth
Genera in family: ± 650 genera, 18,000 species: worldwide; with grasses, requisite in agriculture and most natural ecosystems. Many cultivated, most importantly Arachis , peanut; Glycine , soybean; Phaseolus , beans; Medicago ; Trifolium ; and many orns
Reference: [Polhill & Raven (eds) 1981 Advances in legume systematics; Allen & Allen 1981 Leguminosae]
Family description and key to genera by Duane Isely.

PICKERINGIA

Duane Isely


Species in genus: 1 sp
Etymology: (C. Pickering, Am naturalist, 1805–1875)

Native

P. montana Nutt.

Shrub, rhizomed, leafy or with flowers; thorns terminal or axillary
Stem intricately branched, 1–3 m
Leaf palmate or sometimes simple, evergreen; stipules 0; leaflets 1–3, 1–2 cm, elliptic or ovate; petiole ± 0
Inflorescence: raceme, terminal or axillary
Flower: calyx 5–7 mm, barely lobed; corolla 1.5–1.8 cm, generally purple, keel petals free; stamens 10, free
Fruit dehiscent, 3–6 cm, 4–5 mm wide, oblong; margins narrowed between seeds, often wavy
Seeds 1–8
Chromosomes: 2n=28
Ecology: Chaparral, open woodlands, washes
Elevation: generally < 1700 m.
Bioregional distribution: North Coast Ranges, n Sierra Nevada Foothills, San Francisco Bay Area, South Coast Ranges, n Channel Islands, Transverse Ranges, Peninsular Ranges
Distribution outside California: Baja California
Varieties intergrade but are geog separate.

Native

var. montana


Fruit rarely abundant
Ecology: Chaparral, open woodlands
Elevation: generally < 660 m (to 1700 m in s).
Bioregional distribution: North Coast Ranges, n Sierra Nevada Foothills, San Francisco Bay Area, South Coast Ranges, n Channel Islands, Transverse Ranges
Horticultural information: DRN, SUN: 3, 7, 8, 9, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24; DFCLT.

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