Monographs Details: Cassia grandis L.f.
Authority: Irwin, Howard S. 1966. Contributions to the botany of Guiana. IV. Legumonosae Caesalpinioideae. Mem. New York Bot. Gard. 15: 112-128.
Description:Distribution and Ecology - BRAZIL. Amapa, Rio Oiapoque, near confluence of Riv. Eureupucigne, Irwin, Pires, ir Westra 48247.
The cited collection, a first report for Amapa, is white-flowered, rather than the usual pink. Color notes for this species, when available, are rather confusing because of marked changes with age. Immediately on opening all petals are pink, the standard somewhat yellow toward the base. Within a day the four smaller petals fade to pale salmon, soon followed in this respect by the standard.
In living flowers of the present material the standard was pale pink with the yellow basal blotch, the other petals white. Color distinctions cannot be made from exsiccatae as all flowers tend to dry dull pinkish yellow. Other collections noted as having come from white-flowered trees include one from Guiana (Mapenna Creek, Courantyne R., Forest Dept. of British Guiana 5379) and two from Para (Belem, cultivated, Archer 7560; Rio Guama, Silva 137). There appears to be no geographical significance to the occurrence of this color variant.
Distribution:Brazil South America