Monographs Details: Hevea pauciflora (Spruce ex Benth.) Müll.Arg.
Authority: Maguire, Bassett. 1967. The botany of the Guayana Highland--Part VII. Mem. New York Bot. Gard. 17: 1-439.
Family:Euphorbiaceae
Description:Distribution and Ecology - If the above interpretation is correct, H. pauciflora is confined to the Upper Rio Negro Basin, in both Brazil and Colombia. BRAZIL. Amazonas: Cachoeira Cumata, Rio Xie, 3 Dec 1947, Schultes & Lopez 921-A (fl.; fr. NY); Rio Negro at mouth of Rio Curicuriari, 17 Jan 1948, Schultes & Lopez 96S6-A (fl. NY); Rio Negro Camanaos, 25 Jan 1948, Schultes & Lopez 9647-A. COLOMBIA. Yaupes: vicinity of Piedra Cocui, 27-29 Dec 1947, Schultes & Lopez 9488-A, 9489, 9493, 9497, 9501, 9519, 9541-A (fl. NY); Rio Guainia, Cano del Mico, below San Antonio, June 1948, Schultes & Lopez 10160 (fl. NY).

Discussion:

Siphonia pauciflora Benth., Jour. Bot. & Kew Misc. 6: 370. 1854.

Hevea membranuacea Mull.-Arg., Mart. Fl. Bras. 11(2): 300. 1874.

Hevea pauciflora var coriacea Ducke, Rev. Hevea. 25. 1939.

Type. Siphonia pauciflora Benth. “In rocky situations along the Rio Uaupes and apparently the species is found also in British Guiana... Robt. Schomburgk 817, Rich. Schomburgk 1381” (Bentham). These words would indicate that Bentham thought the type to be Spruce’s collection on Rio Uaupes. There are two isotype specimens in the NY type herbarium under Spruce 2691. This specimen however is not quoted by number by Bentham. Muller-Argoviensis used this specimen (Herb. Mart.) as the type for his Hevea membranacca.

All specimens from Rio Xie, Rio Negro, Cano de Mico and vicinity of Piedra Cocui were distributed as variety coriacea Ducke.

Distribution:Brazil South America| Colombia South America|