Jepson Flora Project: Jepson Interchange    

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Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California

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



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.



James W. Grimes

Perennial, unarmed, gland-dotted (especially leaves), hairy or not, caudexed, rhizomed, or stoloned; roots deep, woody, extensive
Stem ± decumbent at base or erect
Leaves odd-1-pinnate, cauline; stipules reflexed, deciduous; leaflets 3
Inflorescence: raceme, generally axillary, with 1 deciduous bract and 2–3 flowers per node
Flower pedicelled; calyx base swollen on top, tube enlarging in fruit; corolla yellowish white to yellow; 9 filaments fused, 1 less so or free; ovary ± hairy, ovule 1, style tip bent, stigma head-like
Fruit indehiscent, elliptic to depressed-obovate in outline, beaked or not
Seed reniform, smooth
Species in genus: 3 species: w North America, especially CA
Etymology: (Rupert C. Barneby, botanist, 1911–2000)
Reference: [Grimes 1990 Mem New York Bot Gard 61:1–114]


R. rigida (Parish) J.W. Grimes


Plant hairy; caudex woody
Stem erect, < 0.75 m; base purple
Leaf: stipule 4–10 mm, linear-lanceolate or triangular; petiole 40–60 mm; leaflet 35–65 mm, lanceolate, with glands and hairs on both surfaces, much denser on upper
Inflorescence: bract 3–7 mm, deciduous; 1.5–2 mm
Flower: calyx 9–10 mm; banner 14–15 mm
Fruit 9–13 mm, elliptic, golden-brown, smooth to faintly net-sculptured, with glands and red-brown hairs; beak < 3 mm, widely attached
Seed 6.5–7 mm, red-brown
Ecology: UNCOMMON. Woodlands, chaparral, lower montane coniferous forests
Elevation: < 2500 m.
Bioregional distribution: San Bernardino Mountains, Peninsular Ranges
Distribution outside California: Baja California
Synonyms: Psoralea r. Parish; Hoita r. (Parish) Rydb
Horticultural information: TRY.
See the CNPS Inventory for information about endangerment and rarity.
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bioregional map for RUPERTIA%20rigida being generated

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