Monographs Details: Hypolytrum longifolium subsp. rubescens (Huber ex C.B.Clarke) T.Koyama
Authority: Maguire, Bassett. 1967. The botany of the Guayana Highland--Part VII. Mem. New York Bot. Gard. 17: 1-439.
Family:Cyperaceae
Description:Distribution and Ecology - Amazonian basin from Colombian Vaupes eastwards to Brazilian Para. COLOMBIA. Vaupes:Rio Apaporis, Raudal Jirijirimo belowmouth of Kananari, quarzite base, alt 900 ft, Schultes & Cabrera 14945; Rio Negro, San Felipe and vicinity, alt 600 ft, Schultes X Cabrera 18285 (K, US)Rio Vaupes, above Raudal Yurupari, Schultes & Cabrera 18721 (K). VENEZUELA. Amazonas: Region of San Fernando de Atabapo, on right bank of Cano Cupuari, Maguire et al 37688. BRAZIL. Para: Distr. of Acara, Thone Assu, Mexia 6017 (K); Barra: collector unknown, 1888 (K) Rio Negro, San Felipe and vicinity, Schultes & Lopez 9602 (US) ; Ilha de Jerusalem, Rio Negro, Holt X Blake 555 (US). BRITISH GUIANA. Pakaraima Mts., upper Mazaruni River, Imbaimadai Savannas, Maguire X Fanshawe 82263; upper Mazaruni River basin, Kukui River, Tillett X Tillett 45346.

Discussion:

Hypolytrum rubescens Huber ex C. B. Clarke, Kew Bull. Add. Ser. 8: 50. 1908.

Type. Rio Capim, [Brazil] I. Huber 966 (lectotype MG); Barra, River Ta-ruma cataract. [Brazil], R. Spruce 3833 (syntype K).

Distribution:Colombia South America| Venezuela South America| Brazil South America| Guyana South America|