ELIAS, MIMOSOIDEAE (LEGUMINOSAE) THE GENERA OF MIMOSOIDEAE (LEGUMINOSAE) IN THE SOUTHEASTERN UNITED STATES1 THOMAS S. ELIAS Subfamily MIMOSOIDEAE A. P. de Candolle, Prodromus 2: tab. inter 94 & 95, 424. 1825. "Mimoseae" (MIMOSA SUBFAMILY) Trees, shrubs, vines, or herbs, often armed with prickles or stipular spines. Leaves alternate, evenly twice pinnate (or rarely once pinnate or modified as phyllodia or scales, or absent], persistent to deciduous, petiol-ate, the petiole with a conspicuous pulvinus, nectaries present in most genera on petiole and/or rachis, the pinnae usually opposite; leaflets large and few or, more frequently, small and numerous. Inflorescences subter-minal, axillary, ramiflorous, or cauliflorous pedunculate spikes, racemes, or heads, the peduncles often fascicled. Flowers mostly small, regular, (3-)5(-7)-merous, perfect, staminate, or sterile (neutral, and then be-coming showy in some genera), usually densely clustered, sessile to long-pedicellate, bracteate. Sepals valvate or rarely imbricate in bud, rarely free, usually connate, the lobes usually short. Corolla usually longer than calyx, the petals valvate in bud, free or more usually connate, the lobes long to short, usually exceeding the calyx. Stamens 4-10 (usually as many as or twice as many as corolla lobes) or numerous, free or the filaments connate to form a staminal tube or adnate to corolla, usually exserted; filaments usually white, yellow, pink, or red and often the con-'Prepared for a Generic Flora of the Southeastern United States, a project of theArnold Arboretum and the Gray Herbarium of Harvard University made possiblethrough the support of the National Science Foundation (Grant GB-6459X, principalinvestigator Carroll E. Wood, Jr.). This treatment, the seventy-first to be published,follows the format established in the first paper of the series (Jour. Arnold Arb. 39:296-346. 1958). The area covered includes North and South Carolina, Georgia, Florida,Tennessee, Alabama, Mississippi, Arkansas, and Louisiana. The descriptions are basedprimarily on the plants of this area, with additional information in brackets [ ].References that I have not seen are marked by an asterisk. I am most grateful to Dr. Wood for his numerous suggestions in the course ofthis study, his review of the manuscript, and the many corrections, changes, andadditions he has made to it. I am further indebted to my botanical colleagues whohave given freely of their time, knowledge, and materials in the course of this study.Among these are George Avery, W. T. Gillis, R. A. Howard, L. I. Nevling, K. R. Rob-ertson, Bernice G. Schubert, and D. R. Windier. Drs. Schubert and Gillis have kindlyread the entire manuscript, and Dr. Windier has reviewed the treatment of Neptunia.Their thoughtful comments are much appreciated. Mrs. Nancy Dunkly checkedmuch of the bibliography and typed the original manuscript. The illustrations ofAcacia, Albizia, Neptunia, and Schrankia were drawn by Virginia Savage; that ofLeucaena is by Arnold D. Clapman.1974]
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