Jepson Flora Project: Jepson Interchange    

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

Annual, perennial herb, shrub, unarmed
Leaves generally odd-1-pinnate (sometimes ± palmately compound, rarely some or most simple); stipules conspicuous or not; leaflets 3–many, often irregularly arranged
Inflorescence: umbel or 1–2-flowered, axillary, generally peduncled, often bracted
Flower: corolla generally yellow (sometimes white or pink), fading darker; 9 filaments fused, 1 free
Fruit dehiscent or not, exserted from calyx or not, ovoid to oblong, ± beaked
Seeds 1–several
Etymology: (Greek: derivation unclear)
Reference: [Isely 1981 Mem New York Bot Garden 25:128–206]
Spp. generally variable; intermediates may be hybrids. Key below separates natural groups.


L. grandiflorus (Benth.) Greene

Perennial, hairy or glabrous
Stem decumbent to erect
Leaf: stipules gland-like, black, conic; leaflets 7–9, generally 1–2 cm, elliptic or obovate, length 1.5–3 X width; axis (including petiole) 10–35 mm
Inflorescence 3–9-flowered; peduncle generally 1–6 cm, bract near tip
Flower: calyx 6–9 mm, lobes ± = or < tube; corolla 15–25 mm, greenish white or yellow, wings ± = or > keel; stigma puberulent
Fruit dehiscent, 2.5–6 cm, oblong, generally straight
Seeds several
Chromosomes: 2n=14
Ecology: Generally dry, open, disturbed sites, chaparral to yellow-pine forest, sometimes moist river bottoms
Elevation: 300–1800 m.
Bioregional distribution: North Coast, North Coast Ranges, Cascade Range, Sierra Nevada (except Tehachapi Mountain Area), Central Western California, Southwestern California (except Channel Islands)
Distribution outside California: Baja California
Varieties are geog separated.


var. macranthus (Greene) Isely

Plant ± glabrous, finely strigose, or puberulent
Leaf: leaflets generally 1.6–2.2 cm
Ecology: Yellow-pine forests, moist river bottoms
Elevation: 900–1800 m.
Bioregional distribution: Cascade Range, n&c Sierra Nevada.

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bioregional map for LOTUS%20grandiflorus%20var.%20macranthus being generated
YOU CAN HELP US make sure that our distributional information is correct and current. If you know that a plant occurs in a wild, reproducing state in a Jepson bioregion NOT highlighted on the map, please contact us with that information. Please realize that we cannot incorporate range extensions without access to a voucher specimen, which should (ultimately) be deposited in an herbarium. You can send the pressed, dried collection (with complete locality information indicated) to us (e-mail us for details) or refer us to an accessioned herbarium specimen. Non-occurrence of a plant in an indicated area is difficult to document, but we will especially value your input on those types of possible errors (see automatic conversion of distribution data to maps).

Retrieve Jepson Interchange Index to Plant Names entry for Lotus grandiflorus var. macranthus
Retrieve dichotomous key for Lotus
Overlay Consortium of California Herbaria specimen data by county on this map
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