Contributions to the flora of Venezuela / Julian A. Steyermark and collaborators.

v.28:no.4(1957)

An overlooked genus of the Scrophulariaceae / Louis O. Williams.

v.32:no.14(1970)

A taxonomic and phytogeographic study of Brunswick Peninsula (Strait of Magellan) Hepaticae and Anthocerotae / John J. Engel.

v.41(1978)

Two new species of palms from Nicaragua [by] S. F. Glassman.

v.31:no.1(1964)

Two new Nicaraguan Juglandaceae [by] Antonio Molina R.

v.31:no.16(1968)

Tropical American plants, IX / Louis O. Williams.

v.31:no.18(1968)

Studies in the palm genus Syagrus Mart. II / S. F. Glassman.

v.32:no.8(1969)

Tropical American plants, V / Louis O. Williams.

v.29:no.10(1963)

Studies in American plants / Dorothy N. Gibson.

v.31:no.15(1968)

Revision of Lagascea (Compositae, Heliantheae) / Tod F. Stuessy.

v.38:no.8(1978)

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

v.24:pt.9:no.1-2(1970)

Flora of Guatemala : families Leguminosae, Geraniaceae, Oxalidaceae, Tropaeolaceae, Linaceae, Erythroxylaceae, Zygophyllaceae, Rutaceae, Simaroubaceae, Burseraceae, Meliaceae, and Malpighiaceae / by Paul C. Standley and Julian A. Steyermark.

v.24:pt.5(1946)

A new hybrid in the palm genus Syagrus Mart. / S. F. Glassman.

v.32:no.16(1970)

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)