Tropical American plants, VII / Louis O. Williams.

v.31:no.6(1965)

Agriculture, Tehuacan Valley.

v.31:no.3(1965)

Orchids of Peru / Charles Schweinfurth.

v.30:no.3(1960)

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

v.24:pt.7:no.2(1962)

A revision of Cedrela (Meliaceae)

v.29:no.5(1960)

Flora of Guatemala / Paul C. Standley and Julian A. Steyermark.

v.24:pt.6(1949)

Studies in American plants, II / Dorothy N. Gibson.

v.32:no.11(1970)

Flora of Guatemala.

v.24:pt.7:no.3(1963)

Contributions to the flora of South America: Studies on Andean Compositae, II. Studies in South American plants, III.

v.27:no.2(1951)

Studies in the palm genus Syagrus Mart. [by] Sidney F. Glassman.

v.31:no.17(1968)

A taxonomic revision of the genus Cnemidaria (Cyatheaceae) / Robert G. Stolze.

v. 37(1974)

An evaluation of the genus Poteranthera.

v.29:no.9(1963)

New species in the palm genus Syagrus Mart. / S.F. Glassman.

v.31:no.9(1967)

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

v.31:no.12(1968)

Tropical American plants, VI / Louis O. Williams.

v.31:no.2(1964)