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.



Duane Isely

Perennial, unarmed, generally hairy, rhizomed
Stem erect; lower nodes leafless
Leaves palmately compound; lower stipules clasping stem, scarious, others not clasping, green; leaflets 3
Inflorescence: raceme, terminal; bracts like stipules, ± persistent
Flower: calyx lobes 5, but upper 2 variously fused; corolla yellow; stamens 10, free
Fruit slowly dehiscent, short or oblong, flat; base stalk-like; margin often wavy
Species in genus: ± 10 species: North America, Asia
Etymology: (Greek: like a lupine)
Reference: [Isely 1951 Mem New York Bot Garden 25(3):104–122]


T. macrophylla Hook. & Arn.

Plant green, gray, or silvery
Stem 0.3–2 m
Leaf: leaflets 2.5–6 cm, oblanceolate to ovate
Inflorescence 1–5 dm, 6–many-flowered; bracts conspicuous
Flower: calyx 7–10 mm, lobes ± = or < tube; corolla 15–25 mm; ovary generally hairy
Fruit spreading to erect, oblong, often curved, often narrowed in places by poor seed set
Seeds few–several
Chromosomes: 2n=18,36
Ecology: Grassland, chaparral, sandy scrub, woodlands, open ridges, disturbed areas
Elevation: < 2100 m.
Bioregional distribution: Northwestern California, Cascade Range, Central Western California, Southwestern California, Modoc Plateau
Distribution outside California: Oregon
Regionally diverse complex that has been classified variously.


var. macrophylla

Plant green or gray-hairy
Stem 5–20 dm
Leaf sometimes tomentose; hairs wavy or incurved
Fruit generally ascending, sometimes out-curved or erect
Chromosomes: 2n=18
Ecology: Grasslands, chaparral, open woodlands, disturbed areas
Elevation: < 2100 m.
Bioregional distribution: Northwestern California, Central Western California, n Southwestern California.Variable in habit, size, hairiness; robust plants (1–2 m) of Santa Ynez Mtns (Santa Barbara Co.) have been called var. agnina J.T. Howell, Santa Ynez false-lupine
Horticultural information: DRN, IRR: 1, 2, 3, 6, 7, 15, 16, 17, 22, 23, 24 &SHD: 14, 18, 19, 20, 21; STBL.

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bioregional map for THERMOPSIS%20macrophylla%20var.%20macrophylla being generated

Retrieve Jepson Interchange Index to Plant Names entry for Thermopsis macrophylla var. macrophylla
Retrieve dichotomous key for Thermopsis
Retrieve multiple-entry key (MEKA) for Thermopsis
Overlay Consortium of California Herbaria specimen data by county on this map
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