8 Phytologia (A ug 2005) 8 7(2) NEW SPECIES AND NEW COMBINATIONS IN THE TRIBE VERNONIEAE (ASTERACEAE) Harold Robinson Department of Botany, National Museum of Natural History, MRC-166, P.O. Box 37012, Smithsonian Institution, Washington, D.C. 20013-7012 ABSTRACT Chresta hatschbachii, Critoniopsis diazii, C. macrofoliata, Lepidaploa irwinii and Vemonanthwa cabralensis are described as new and the combinations Gymnanthemum triflorum, Hilliardiella sutherlandii, Leiboldia guerrereana, and Linzia accommodata are made. KEY WORDS: Vernonieae, Chresta, Critoniopsis, Gymnanthemum, Hilliardiella, Leiboldia, Lepidaploa, Linzia, Vernonanthura, Asteraceae. Examination of Vernonieae specimens since publication of the general treatment of the American members (Robinson, 1999a) and the limited treatment of Paleotropical members (Robinson, 1999b) has revealed various species that need to be described and combinations that need to be validated. These include species from Mexico, Peru, Brazil, and Africa. The present validations will allow proper identifications and annotations of specimens. This will also help to avoid the continued misuse of the generic name Vernonia for non-Vernonia species where a proper alternative is readily available. Measurements of floral parts and pollen were taken from material in Hoyer's solution. Gymnanthemum triflorum (Bremek.) H.Rob., comb, nov., basionym Vernonia triflora Bremek., Ann. Transvaal Mus. 15: 262 (1933). S. Africa.