- Taxonomic report of the International Lepidoptera Survey
- Ten new species of Erythroxylum (Erythroxylaceae) from Bahia, Brazil
- Three new Nicaraguan Epidendrums
- Tijdschrift voor entomologie
- Tools for identifying biodiversity : progress and problems
- Transactions
- Transactions of the Entomological Society of London
- Transactions of the Linnean Society of London. Zoology
- Transactions of the Royal Society of South Australia, Incorporated
- Transactions of the Wisconsin Academy of Sciences, Arts, and Letters
- Tropical American Myrtaceae, II ; notes on generic concepts and descriptions of previously unrecognized species
- Tropical American Myrtaceae; notes on generic concepts and descriptions of previously unrecognized species
- Tropical American plants, II
- Tropical American plants, III / Louis O. Williams
- Tropical American plants, IX
- Tropical American plants, V
- Tropical American plants, VI
- Tropical American plants, VII
- Tropical American plants, VIII
- Tropical American plants, X
- Tropical American plants, XI
- Tropical American plants, XII
- Tropical American plants, XVII
- Two new Guatemalan Tournefortias
- Two new Nicaraguan Juglandaceae
- Two new species of palms from Nicaragua
- Typification of Schlechter's Costa Rican Orchidaceae, types collected by A. Brenes. I