Monographs Details: Sipanea wilson-brownei R.S.Cowan
Authority: Maguire, Bassett. 1967. The botany of the Guayana Highland--Part VII. Mem. New York Bot. Gard. 17: 1-439.
Family:Rubiaceae
Description:Distribution and Ecology - British Guiana and Estado Bolivar, Venezuela. VENEZUELA. Bolivar: Desde El Dorado hacia al Este, km 92, Cerro Paujil, alt 500 m, Bernardi 2967; lugares abiertos de selva higrofitica, 105 km de El Dorado hacia Santa Elena, Foldats 2679; alrededores Km 88, carretera El Dorado, Aristeguieta 3722; forested area on top of ridge in vicinity of Km 134 S of El Dorado, bordering headwaters of Rio Cuyuni NE of Luepa, alt 1300 m, Steyermark & Nilsson 520; along forested carretera between Km 109 and 125, between El Dorado and Cerro Uei, Steyermark & Nilsson 837; moist intrusive, north portion of Cerro Uroi, Rio Uroi, Alto Rio Cuyuni, alt 250-400 m, Maguire, Steyermark, & C. K. Maguire 53733.

Discussion:

Type. Komo Creek, British Guiana, Dec 1948, G: Wilson-Browne 637.

The corolla tube is described originally as ‘‘intus et pro parte superiore extus puberulens.” A study of the holotype specimen shows the corolla-tube externally glabrous except for the hirsutulous uppermost 5 mm, where the pubescence is of ascending, subappressed hairs, internally the tube glabrous in the lowest 3 mm, then puberulous up to the throat where again glabrous. In the Maguire, Steyermark & Maguire 53733 collection the corolla-tube is glabrous in the lowest 3-10 mm externally, then appressed-pilose in the upper half or two-thirds for 4 - 6 mm, within the tube is glabrous in the basal 2.5 mm, then puberulous rather densely around the anther zone, above this sparsely to moderately puberulous in lines, finally nearly or quite glabrous at the orifice.

Distribution:Venezuela South America| Guyana South America|