TUCKER, BAMBUSOIDEAE239 THE GENERA OF BAMBUSOIDEAE (GRAMINEAE) IN THE SOUTHEASTERN UNITED STATES'2 GORDON C. TUCKER3Subfamily BAMBUSOIDEAE Ascherson & Graebner, Synop. Mitteleurop. Fl. 2: 769. 1902. Perennial or annual herbs or woody plants of tropical or temperate forestsand wetlands. Rhizomes present or lacking. Stems erect or decumbent (some-times rooting at the lower nodes): nodes glabrous, pubescent, or puberulent.Leaves several to many, glabrous to sparsely pubescent (microhairs bicellular);leaf sheaths about as long as the blades, open for over '/2 their length, glabrous:ligules wider than long, entire or timbriate: blades petiolate or sessile, ellipticto linear, acute to acuminate, the primary veins parallel to-or forming anangle of 5-10� with-the midvein, transverse veinlets numerous, usually con-spicuous, giving leaf surface a tessellate appearance; chlorenchyma not radiate(i.e., non-kranz; photosynthetic pathway C,). Inflorescences terminal or terminaland lateral, paniculate, the primary branches nearly horizontal, scabrous and/or hispidulous throughout; secondary branches often (and tertiary branchessometimes) present. Spikelets oblong to lanceolate, subterete to strongly dor-'Prepared for the Generic Flora of the Southeastern 1 nited States, a long-term project made possibleby grants from the National Science Foundation and at this writing supported by BSR-8415367(Norton G. Miller. principal investigator) under which this account was prepared, and BSR-8415769(Carroll E. Wood, Jr.. principal investigator). This treatment, the 123rd in the series. follows theformat established in the first paper (Jour. Arnold Arb. 39: 296-346. 1958) and continued to thepresent. The area covered by the Generic Flora includes North and South Carolina. Georgia. Florida.Tennessee, Alabama. Mississippi, Arkansas. and I.ouisiana. The descriptions are based primarily onthe plants of this area. with information about extraregional members of a family, subfamily, or genusin brackets. Those references I did not verify are marked with asterisks. I have continued to enjoy working with Norton Miller and Carroll Wood on the Generic Floraproject. and I thank them for their interest and advice. Thomas J. Rosatti and lhsan A. Al-Shehbazhave helped frequently. Stephen A. Spongherg and Elizabeth B. Schmidt improved the final manu-script with their editorial precision and expertise. Thanks are extended to the staffs of the New YorkState Library (especially Alta Beach. Senior Iibrarian) and the Libraries of the Arnold Arboretumand Gray Herbarium (especially Barbara Callahan. Iibrarian) for providing many references. I thankthe curators of the following herbaria who have sent specimens or provided hospitality and accessto collections during my visits: A, A[LU <'CNI. (CONN. F. OH, M, MO. MT. MTMG, N(BS, NEBC. NYS. PENN.PH, UNA, VT, and Yv. Christopher S. (ampbell. Walter S. Judd. Emmet J. Judziewicz, Linda L. Rader,Robert .. Wilbur. and the late Thomas R. Soderstrom have shared information and references. (ontribution number 562 of the New York State Science Service. For an account of the family, its subfamilics. and tribes. see C. S. Campbell. The subfamilies andtribes of Gramineae (Poaceae) in the southeastern I nited States. Jour. Arnold Arb. 66: 123-199.1985. 'Biological Survey. New York State Museum. The State Education Department. Albany. New York12230.� President and Fellows of Harvard College. 1988.Journal of the Irnold Arhoreum 69: 239-273. July. 1988.