Monographs Details: Cassia acosmifolia var. euryloba H.S.Irwin & Barneby
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
Description:Latin Diagnosis - Cassia acosmifolia Martius ex Bentham var. euryloba Irwin & Barneby, var. nov., a var. oropedii caeterius persimili racemo confertifloro, alabastris dense pilosulis, legumine magno 4.5-5.3 x 0.8-0.9 cm, patriaque procul aliena abstans.

Species Description - Characters as given in the key. — Collection: 1.

Distribution and Ecology - Gallery forest, on white sand near 800 m, known only from the type-locality on the e. slope of Sa. do Espinhaço in e.-centr. Minas Gerais. — Fl. I-III.

Discussion:

In foliage and apparently in habit of growth var. euryloba closely resembles the distantly allopatric var. oropedii, but differs in the densely flowered racemes, the yellowish-tomentellous flower-buds, and the exceptionally long and wide pod, which is setulose as well as finely villosulous. The plant resembles var. acosmifolia in density of the raceme, but has plumply ovoid flower- buds, a reflection of the relatively broad sepals, and a setose ovary. The ripe fruit of var. acosmifolia is unknown but is probably similar to that of var. oropedii. The type-locality of var. euryloba on the east slope of Serra do Espinha├žo might suggest a genetic connection with C. barbata present on the headwaters of Rio Pardo not far distant northward, but the reticulation of the leaflets is quite different and the epidermis of the branchlets does not exfoliate. The status of var. euryloba will require reassessment as more material becomes available.

Distribution:Minas Gerais Brazil South America| Brazil South America|