New species of Digitaria, Pennisetum, and Poa (Gramineae) from Costa Rica / Richard W. Pohl.

v.38:no.2(1976)

Experimental studies on the nature of species

"Literature cited": v.1, p. 437-442; v.2, p. 154-163; v.3, p. 124-125; v.5, p. 198-204; v.6, p. 113-115.