Monographs Details: Cassia brevicalyx Benth. var. brevicalyx
Authors:Howard S. Irwin, Rupert C. Barneby
Authority: Irwin, Howard S. & Barneby, Rupert C. 1978. Monographic studies in Cassia (Leguminosae, Caesalpinioideae). III. Sections Absus and Grimaldia. Mem. New York Bot. Gard. 30: 1-300.
Family:Caesalpiniaceae
Synonyms:Cassia brevicalyx Benth.
Description:Species Description - Shrubs 1-3 m; lfts (as given in key) of relatively broad outline and glabrous or almost so, not glandular. — Collections: 11.

Distribution and Ecology - Clearings of chapadao, second-growth woodland, gallery margins, cerrado and caatinga on sandy soil, up to 1000 m, scattered over the highlands of e. Brazil from centr. Piaui (Oeiras) to e. Paraiba (Arara) and Pernambuco (Garanhuns) s. to Chapada Diamantina (Sas. do Rio de Contas and da Agua de Rega) in Bahia and n. Sa. do Espinhaço in Minas Gerais (Grao Mogol). - Fl. X-III. "Habitat prope Oeiras, prov. Piauhy: Gardner 2122."

Discussion:

Modern collections of var. brevicatyx are all alike in their long petioles and greatly elongated, many-flowered racemes, differing in these respects from the holotypus, which has petioles only 12-18 mm and no more than 10 flowers to the longest raceme. We suspect, however, that the type-specimen is depauperate and the flowers, since the accompanying foliage is in the first flush of new growth, have the stunted character of off-season bloom. The pale exfoliating epidermis of the branchlets, the venation and texture of the leaflets, and the proportions of the perianth can be matched closely in other collections here referred to var. brevicalyx. Bentham described the ovary of C. brevicalyx as glabrous, a point we did not venture to verify by dissection of one remaining flower. Pods of var. brevicalyx are normally pubescent, but these and glabrous ones have been encountered close together in northern Bahia (Irwin & al 31000, 31207).

Distribution:Brazil South America| Piauí Brazil South America| Paraíba Brazil South America| Pernambuco Brazil South America| Minas Gerais Brazil South America|