Monographs Details: Lotus stipularis var. stipularis
Authority: Isely, Duane. 1981. Leguminosae of the United States. III. Subfamily Papilionoideae: tribes Sophoreae, Podalyrieae, Loteae. Mem. New York Bot. Gard. 25 (3): 1-264.
Description:Distribution and Ecology - Coastal ranges and foothills, thickets, chaparral, logged forest. Ca. 1000-3200 ft. April-June (-July).
Discussion:Hosackia stipularis Benth. (1837); Lotus stipularis (Benth.) Greene (1890).
H. macrophylla Kellogg (1861).
H. balsamifera Kellogg (1861); L. balsamiferus (Kellogg) Greene (1894); H. stipularis subsp balsamifera (Kellogg) Abrams (1944).
L. purpurascens Eastw. (1940).
Var stipularis is patterned somewhat as follows, north to south:
1. Stipules inconspicuous; plants barely pubescent and scarcely distinguishable from L. aboriginus. Mendocino co.
2. As above, but plants distinctly pubescent and frequently purple-flowered (L. purpurascens). Mendocino co and somewhat south.
3. Plants similar to type 2, but with conspicuous, globular or raised glands on leaf rachises, upper stems and peduncles (L. balsamiferus). Seemingly restricted to Lake and Sonoma cos.
4. Stipules conspicuous; plants usually robust; upper stems villous; leaves punctate or not; keel shape more variable than in other vars; Marin co and s.
Lotus aboriginus and L. stipularis var stipularis overlap in Mendocino co and seemingly merge; indeed, the former was initially described by Ottley (1923) as a variety of L. stipularis.