Monographs Details: Senna versicolor var. heterosperma H.S.Irwin & Barneby
Authors:Howard S. Irwin, Rupert C. Barneby
Authority: Irwin, Howard S. & Barneby, Rupert C. 1982. The American Cassiinae. A synoptical revision of Leguminosae tribe Cassieae subtrib Cassiinae in the New World. Mem. New York Bot. Gard. 35, part 1: 1-454.
Description:Variety Description - Characters as given in key [Key: "Ovules 24-28; seeds 4.5-5 x 3.2-4 mm, occupying locules 2-3 mm long, their areole 1.7-2 x 0.8 mm; Maranon valley in Cajamarca, Peru."]; style perhaps longer than that of var. versicolor, 2-3.5 (not 1-2) mm.—Collections: 3.

Distribution and Ecology - Open and brushy or partially wooded canyon slopes near 2900-3000 m, known only from the valley of Rio Maranon in s.-e. Cajamarca and perhaps adjoining s. Amazonas, Peru.—Fl. III-VIII.

Discussion:A handsome shrub, introduced to cultivation by way of seeds of the type- collections, grown for ornament in California (A. Griffiths 5651) and under glass in New York. It is the C. latopetiolata of Isely, 1975, p. 105.
Distribution:Cajamarca Peru South America| Amazonas Peru South America|