Monographs Details: Lotus junceus (Benth.) Greene x L. scoparius (Nutt.) Ottley
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.
Discussion:Yellow-flowered, glabrate, or diffuse Syrmatium with peduncled umbels, but the foliage aspect of Lotus scoparius, are frequent in coastal middle California. They are commonly considered to represent hybrids between L. scoparius and either L. junceus or L. benthamii (see L. benthamii x scoparius). Some are probably sand ecotypes of L. scoparius. Those distributed from Sonoma to Santa Barbara cos, with pedunculate umbels, reduced and broad calyx lobes and (or) strongly curved fruits, indeed suggest L. junceus x scoparius, but their genetic origin has not been demonstrated.