Monographs Details: Psychotria muscosa (Jacq.) Steyerm.
Authority: Maguire, Bassett. 1972. The botany of the Guayana Highland--part IX. Mem. New York Bot. Gard. 23: 1-832.

Morinda muscosa Jacq., Stirp. Amer. 65. pl. 45. 1763.

Tapogomoa muscosa (Jacq.) Poir. in Lam., Diet. 7: 587. 1806.

Cephaelis muscosa (Jacq.) Sw., Prodr. 46. 1788; FI. Ind. Occ. 442. 1797.

In his revision of Cephaelis of Mexico, Central America, and the Antilles, Molino (Ceiba 4(1): 16. 1953) does not distinguish any subspecies or varieties of Cephaelis muscosa. A close examination of abundant material from South America shows that it indeed can be separated from typical Lesser Antillean material, whence the type from Martinique, on the basis of several morphological characters, the most obvious being the more elongated stipular teeth and puberulence of the petioles, stems, and lower midrib of the leaf blades, and in the longer, more prominent calyx lobes. Other differences are mentioned below in the discussion following the species.