Monographs Details: Duroia sprucei Rusby
Authority: Maguire, Bassett. 1965. The Botany of the Guayana Highland. Mem. New York Bot. Gard. 12 (3): 1-285.
Family:Rubiaceae
Scientific Name:Duroia sprucei Rusby
Description:Distribution and Ecology - Distribution. A small- to medium-sized tree bordering lake and river margins in the Orinoco drainage of Venezuela, upper Rio Negro and Amazonian drainage of Colombia, Brazil, and Peru. A single collection, A. C. Smith 2237 from Karenambo, basin of Rupununi river, British Guiana, is also referable to this species.

Discussion:Conpoui micrantha James Ladbrook, Jour. Bot. 58: 176. 1920, type: French Guiana, (BM). The staminate flowers, as judged by the specimen of Aristeguieta 4571 from estado Guarico, Venezuela, are shortly pedunculate and, in this respect, similar to those of D. fusifera. The only collection thus far seen with pistillate flowers is Aristeguieta 4572. In this collection the pistillate flowers are sessile or subsessile with only a short stipe present. The fruits, while mainly sessile or subsessile, show variation in this respect in different stages of maturity. The leaves vary considerably and, although usually 3-verticillate, m a y be 4-verticillate. The shape of the fruit varies from oblong-elliptic or elliptic-oblong to ovoid-subglobose, and, as it matures, becomes less stipitate as in D. fusifera. Pending future collections showing the pistillate flower stipe in all stages of development, this taxon is retained in the specific category. It may eventually have to be merged with D. fusifera.
Distribution:Venezuela South America| Brazil South America| Colombia South America| Peru South America| Guyana South America|