Monographs Details: Senna organensis var. heterandra 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 - Lvs of var. organensis, but a gland between proximal pair of lfts only; stamens strongly heteromorphic, the filaments of 4 median stamens ±2.5 mm, of 3 abaxial ones 4.5-5.5 mm, the anthers of 4 median stamens 3.8-4.5 mm, of 3 abaxial ones 5-7 mm.—Collections: 3.

Distribution and Ecology - Woodland at 1800 m, known certainly only from Mt. Itatiaia in w. Rio de Janeiro.

Discussion:The typus and two other known collections of var. heterandra are in flower only, but resemble var. organensis at so many points that we have little doubt as to their affinity. For the present the more highly differentiated androecium appears adequately distinctive.
Distribution:Rio de Janeiro Brazil South America|