Monographs Details: Lotus strigosus var. strigosus
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 - Cismontane California from Yuba and Sonoma cos s; also insular, of diverse habitats, usually open, sandy or gravelly soil of coastal scrub and chaparral, and mt. foothills, desert slopes in s; roadsides and other ruderal and disturbed areas, urban as well as rural; often conspicuous after fires, abundant. 0-4000(-7500) ft. Feb.-June (-Oct.).
Discussion:Hosackia strigosa Nutt. (1838); L. strigosus (Nutt.) Greene (1890); Anisolotus strigosus (Nutt.) Hell. (1907).
H. rubella Nutt. 0838); L. rubellus (Nutt.) Greene (1890); A. rubellus (Nutt.) Hell. (1912).
H. nudiflora Nutt. ( 838), L. nudiflorus (Nutt.) Greene (1890); L. strigosus var nudiflorus (Nutt.) Jeps. (1901); A. nudiflorus (Nutt.) Hell. (1912).
Lotus strigosus var strigosus is variable in peduncle length, flower size, leaflet proportions, and, regionally, in pubescence. The flowers are consistently large, 8-10 mm, in the northern portion of the range, while both small- and large-flowered forms occur in the southern California. Flower size is not affected by plant vigor as in L. purshianus', tiny plants may bear large flowers and vice versa.
The strigose pubescence is reasonably consistent, except in southern California where Lotus strigosus var strigosus blends with vars hirtellus and tomentellus. Leaflet proportions, on the other hand, are diverse both regionally and locally. Contrasting populations may grow together without blending. Nuttall’s names, Hosackia s trigos a, H. nudiflora, and H. rubella, all from the vicinity of Monterey, illustrate local population variance. The first two were said to have large, yellow flowers, of which H. strigosa was the more vigorous plant, with longer pods. Hosackia rubella was characterized by smaller, reddish flowers. Subsequent authors (e.g., Greene, 1890) who have used these names have variously modified Nuttall’s descriptions.
Ottley (1923, 1944) distinguished Lotus strigosus and L. tomentellus on the basis of seeds, which she described in 1944 as: “Cubical, notched at the hilum,” L. strigosus, and “globose to oval, an occasional cubical,” L. tomentellus. These differences are helpful if specimens possess mature seeds, but as other features, not consistently diagnostic.
Distribution:United States of America North America