title: Lettowia, a new genus of Vernonieae from East Africa (Asteraceae).
abstract: A new genus, Lettowia H. Rob. & Skvarla is named for the single East African species originally described as Vernonia nyassae Oliv. Its pollen is lophate and triporate, with a perforated tectum restricted to the muri. The new genus is placed near Vernoniastrum in the subtribe Erlangeinae.
authors.affiliation: Dept. of Botany, MRC 166, National Museum of Natural History, P.O. Box 37012, Smithsonian Institution, Washington, D.C. 20013-7012.
authors.forename: Harold
authors.initials: H
authors.lastname: Robinson
authors.forename: John J
authors.initials: JJ
authors.lastname: Skvarla
keywords: East Africa; Lettowia; new genus; triporate pollen