Revision of New World Species of Psoraleeae (Leguminosae: Papilionoideae) Mem 61

South American species of Psoraleeae are shrubs or trees, and the North American species are perennial herbs adapted to woodlands, grasslands, prairies, plains and deserts. Mosts species are found in temperate regions and are tall, erect, and repeatedly branched, but radiation into more xeric habitats has led to a reduction of the plant body. This monograph of the New World species of Psoraleeae includes a phylogenetic analysis, keys, descriptions, black and white illustrations, distribution maps, information on phenology, and comments on each species by the author.