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

v.38:no.2(1976)

Comprehensive index to the Flora of Guatemala / Terua P. Williams.

v.24:pt.13(1977)

Tropical American plants, VIII / Louis O. Williams.

v.31:no.10(1967)

Tropical American plants, III / Louis O. Williams.

v.29:no.7(1962)

Flora of Guatemala / Paul C. Standley, Louis O. Williams, Dorothy Nash Gibson.

v.24:pt.10:no.3-4(1974)

Tropical American Myrtaceae; notes on generic concepts and descriptions of previously unrecognized species.

v.29:no.3(1956)

Orchids of Peru / Charles Schweinfurth.

v.30:no.1(1958)

Preliminary taxonomic studies in the palm genus Attalea H.B.K. / S. F. Glassman.

v.38:no.5(1977)

A new Guatemalan Spigelia / Dorothy N. Gibson.

v.32:no.1(1968)

Orchids of Guatemala [by] Oakes Ames and Donovan Stewart Correll.

v.26:no.1(1952)

Flora of Guatemala / Paul C. Standley and Louis O. Williams.

v.24:pt.8:no.4(1969)

A new Odontoglossum from Nicaragua [by] Alfonso H. Heller.

v.32:no.7(1969)

Syagrus oleracea (Mart.) Becc. and closely related taxa / S. F. Glassman. --

v.32:no.3(1968)

Orchids of Peru / Charles Schweinfurth.

v.30:no.4(1961)

Tropical American Myrtaceae, II ; notes on generic concepts and descriptions of previously unrecognized species / Rogers McVaugh.

v.29:no.8(1963)