Monographs Details: Cassia L. sect. Apoucouita
Authors:Howard S. Irwin, David J. Rogers
Authority: Irwin, Howard S. & Rogers, David J. 1967. Monographic studies in Cassia (Leguminosae -- Caesalpinoideae) II. A taximetric study of section Apoucouita. Mem. New York Bot. Gard. 6: 71--120.
Discussion:

Cassia L. sect. Apoucouita Bentham, Mart. Fl. Bras. 15(2): 129. 1870.

Trees and shrubs; leaves mostly spirally arranged (distichous in C. apoucouita and C. adiantifolia); the petiolar glands scutellate or verruciform, occurring between or immediately below the petiolules of all, some, or just one (usually the lowest) leaflet pair. Inflorescence a raceme, mostly arising from defoliated nodes of the previous season (s), sometimes two or three together developing from serial buds (C. duartei, C. negrensis), less frequently occurring on leafy nodes of the season (especially in C. duartei); inflorescence axis bearing scattered minute scutellate or verruciform glands often resembling those of the petiole; stamens 10, equal or subequal, the filaments very short, the anthers commonly pubescent and dehiscing by lateral sutures. Legume pendent, the valves woody-coriaceous. Seed lenticular, circular to ovate, nitid, the faces finely pitted, the pitting mostly unpatterned or, at most, in short lines. Species of tropical America.