Monographs Details: Lagenocarpus guianensis var. hypochaetus T.Koyama
Authority: Maguire, Bassett. 1965. The Botany of the Guayana Highland. Mem. New York Bot. Gard. 12 (3): 1-285.
Family:Cyperaceae
Description:Latin Diagnosis - Fructificationes grandiores (4.3-) 5-6.2 mm longae 2-2.2 mm latae lanceolatooblongae vel anguste ovatae apice in rostrum sublongum conspicuum subsensim attenuantes. Squamellae hypogynae subulato-setiformes cum 1/2-3/5-fructificationi aequilongae antrorsim spinuloso-ciliatae. Inflorescentia angustior et laxior, ramis erecto-patentibus magis flaccidioribus. Caeteroquin sicut ssp. guianensis.

Distribution and Ecology - Distribution. Western Guayana and its adjacent regions; known only by the cited specimens.

Discussion:This subspecies differs from subsp. guianensis by the larger fructifications subtended by hypogynous bristles, which attain the length of the body of the fructification. Superficially it can be recognized by the looser and narrower inflorescence, of which the branches are more flexible and not so divergent as in subsp. guianensis. The collected specimens suggest that this new subspecies has its own range lying in the small western portion of Guayana. Subspecific status is designated on the basis of both morphological and geographical evidences.