Part? 2, 1912] POACEAE 113 
2. Andropogon glomeratus (Walt.) B.S.P. Prel. Cat. 
N.Y. 67. 1888. 
Cinna glomerata Walt. Fl. Car. 59. 1788. 
Andropogon macrourus Michx. Fl, Bor. Am. 1:56. 1803. 
Andropogon spathaceus Trin. Fund. Agrost. 186. 1820; Mém. Acad. St. Petersb. VI. 2: 280. 1832. 
Anatherum macrourum Griseb. Mem. Am. Acad. II, 8: 534. 1862. 
Andropogon macrourus abbreviatus Hack, in DC. Monog,. Phan. 6: 408. 1889. 
Andropogon macrourus hirsutior Hack. in DC. Monog. Phan. 6: 409. 1889. 
Andropogon macrourus corymbosus Chapm.; Hack. in DC. Monog. Phan. 6: 409. 1889. 
Sorgum glomeratum Kuntze, Rev. Gen. 790. 1891. 
Andropogon glomeratus hirsutior ©. Mohr, Bull. Torrey Club 24:21. 1897. 
Andropogon corymbosus Nash, in Britton, Man. 69. 1901. 
Andropogon corymbosus abbreviatus Nash, in Britton, Man. 70. 1901. 
Stems 4-10 dm. tall, rather stout, from a little longer than to twice as long as the basal 
leaves, the branches much divided, the lower ones usually elongate and nearly equaling the 
upper, thus forming a corymbiform panicle, the upper nodes of the primary and all those of the 
other branches densely barbed; leaf-sheaths keeled, those at the base much compressed and 
equitant, rough, often more or less papillose-hirsute, especially the shorter and crowded ones 
of the inflorescence; stem-leaves with blades 3 dm. long or less, 5 mm. wide or less, rough; 
spathes very rough, narrow and tightly rolled around the rather stout common peduncle of 
the racemes, which is densely hispidulous toward the summit, or loose and enclosing the 
racemes; racemes in pairs, 2-3 cm. long; sessile spikelet 4-5 mm. long, the awn 12-15 mm. 
long, straight or nearly so; pedicellate spikelet usually present as a subulate scale 1-2 mm. long. 
TYPE LOCALITY: South Carolina. 
DISTRIBUTION: Nantucket Island, Massachusetts; New York to Florida and Mississippi ; 
Tennessee. 
ILLUSTRATIONS: Bull. U. S. Dep. Agr. Agrost.7:/.9; Bull. Tenn. Exp. Sta.7: p1.3,f. 11; 
Britt. & Brown, Ill. Fl. f. 222. 
3. Andropogon tenuispatheus Nash, sp. nov. 
Andropogon macrourus pumilus Vasey, Bot. Gaz. 16:27. 1891. Not A. pumilus Roxb. 1820. 
Andropogon glomeratus tenuispatheus Nash, in Small, Fl. SE. U. S. 61. 1903. 
Stems 5-15 dm. tall, commonly stout, much branched, the branches repeatedly and 
fastigiately divided, the lower ones somewhat elongate but considerably shorter than the stem, 
thus forming a large oblong glomerate panicle, rarely shorter and corymbiform, the nodes of 
the secondary branches and their divisions, and sometimes the nodes of the primary branches, 
densely barbed; leaf-sheaths keeled, glabrous, or sometimes pubescent; blades up to 4 dm. 
long, 7 mm. wide or less, rough; spathes 2.5—-3 cm. long, smooth and glabtous, equaling or 
somewhat exceeding the racemes, or tightly inrolled on the exserted or nearly exserted smooth 
and glabrous peduncle, fastigiately crowded at the summit of the stem and ends of the branches; 
racemes in pairs, 1-2 cm. long; sessile spikelet 3-4 mm. long, lanceolate, the first scale hispid 
on the keels, the intercarinal space flat or somewhat depressed, the fourth scale entire or 
nearly so, the awn 10-15 mm. long, straight or geniculate, the hispid subula many times 
longer than the column; pedicellate spikelet wanting, or present as a subulate rudimentary 
scale. 
TYPE LOCALITY: Florida. 
DISTRIBUTION: Georgia and Florida to southern California; Lower California; Guatemala; 
Bahamas and other West Indies ; also in tropical South America. 
ILLUSTRATIONS: Vasey, Agr. Grasses U. S. £/. 26 (as A. macrourus) ; ed. 2. pl. 28; Bull. U. S. 
Dep. Agr. Agrost. 17: /. 317. 
4. Andropogon virginicus L. Sp. Pl. 1046. 1753. 
Andropogon dissitifiorus Michx. Fl. Bor. Am.1: 57. 1803. 
Anatherum virginicum Spreng. Pugill. 2: 16. 1815. 
Andropogon vaginatus Ell. Bot. S. C. & Ga. 1: 148, 1816. 
Andropogon tetrastachyus Ell. Bot. S. C. & Ga. 1: 150. 1816. . 
Andropogon eriophorus Scheele, Flora 27: 51. 1844. Not A. eriophorus Willd. 1806. 
? Andropogon Louisianae Steud. Syn. Gram. 383. 1854. 
Andropogon Curtisianus Steud. Syn. Gram, 390. 1854. 
Andropogon virginicus viridis ditior Hack. in DC. Monog. Phan. 6: 411. 1889. 
Andropogon virginicus tetrastachyus Hack. in DC. Monog. Phan. 6: 411. 1889. 
Sorgum virginicum Kuntze, Rev. Gen. 792. 1891. 
Andropogon macrourus viridis Chapm.; Vasey, Contr. U. S. Nat. Herb.3: 11. 1892. 
Andropogon virginicus vaginatus Chapm. FI. S. U. S. ed. 3, 594, 1897. 
