114 NORTH AMERICAN FLORA [VorumeE 17 
Stems tufted, 5-10 dm. tall, the sparsely divided branches in 1’s—3’s, distant, the nodes 
glabrous, very rarely barbed; leaf-sheaths, at least the lower ones, commonly more or less 
tuberculate-hirsute on the margins with long usually lax hairs, or sometimes a part or the whole 
.of the sheaths densely hirsute; ligules scarious, ciliate, about 0.5 mm. long; blades 4 dm. 
long or less, 2-5 mm. wide, rough or roughish, usually hirsute on the upper surface near 
the base; spathes 3-5 cm. long, extending beyond the racemes; racemes generally in pairs, 
rarely in 3’s or 4’s, 2-3 cm. long, the rachis slender and fragile; sessile spikelet 3-4 mm. long, 
narrowly linear-lanceolate, one and a half times to twice as long as the internodes, pale or 
colored, the first scale hispid on the keels, the callus barbed with hairs about one third as Jong 
as the spikelet, the fourth scale very shortly 2-toothed, with an awn 1-1.5 cm. long; pedicellate 
spikelet wanting, or rarely present as a minute scale, the pedicel exceeding the sessile spikelet. 
TYPE LOCALITY: Virginia. 
DISTRIBUTION: Rhode Island to Missouri and Oklahoma, and south to Florida, Texas, and 
Mexico; Bermudas; Bahamas; Jamaica; Cuba; Haiti. 
ILLUSTRATIONS: Vasey, Agr. Grasses U.S. p/. 24; ed. 2. 1. 26; Bull. U. S. Dep. Agr. Agrost. 
7: f. 10; Bull. Tenn. Exp. Sta. 7: pi. 3, f. 10; Britt. & Brown, IL Fl. f. 220. 
5. Andropogon longiberbis Hack. Flora 68: 131. 1885. 
Sorgum longiberbe Kuntze, Rev. Gen. 792. 1891. 
Stems tufted, 5-10 dm. tall, the branches in 1’s—3’s; leaf-sheaths, especially those on the 
innovations, appressed-hirsute with silky hairs, shorter than the internodes; blades 5 dm. long 
or less, up to 7 mm. wide, those on the innovations densely appressed-hirsute, those on the 
stem more or less so beneath, rough above; spathes 3-5 cm. long, usually considerably exceeding 
the racemes, commonly brown; racemes in pairs, rarely in 3’s or 4’s, 3-4 cm. long, stout; 
sessile spikelet 4-4.5 mm. long, pale, about twice as long as the stout rachis-internodes, 
the first scale hispid on the keels, the fourth scale shortly 2-toothed, bearing a straight or 
nearly straight awn 12-16 mm. long; pedicellate spikelet a subulate scale, or wanting, the 
pedicel rather stout and a little exceeding the sessile spikelet. 
TYPE LOCALITY: Florida. 
DISTRIBUTION : Florida. 
ILLUSTRATION: Bull..U. S. Dep. Agr. Agrost.17: 7. 315. 
6. Andropogon capillipes Nash, Bull. N. Y. Bot. 
Gard. 1: 431. 1900. 
Andropogon matrourus glaucopsis Ell. Bot. S. C. & Ga. 1: 150. 1816. 
cae A A wirginicus glaucus Hack, in DC. Monog. Phan. 6: 411. 1889. Not A. glaucus Retz. 
Andropogon virginicus dealbatus C. Mohr; Hack. in DC. Monog. Phan. 6: 411. 1889. 
Andropogon glomeratus glaucopsis C. Mohr, Bull, Torrey Club 24: 21. 1897. 
Andropogon glaucopsis Nash, in Small, F1. 'SE. U. S. 62, 1903. Not A. glaucopsis Steud. 1854. 
Whole plant blue- or grayish-green, intensely glaucous, smooth and glabrous. Stems 
6-12 dm. tall, branched, the branches in 1’s-3’s; leaf-sheaths keeled, the lower ones compressed; 
blades 2 dm. long or less, 1-6 mm. wide, erect; spathes 2-6 cm. long, equaling or exceeding the 
racemes; racemes 1.5—4.5 cm. long, the rachis slender, the internodes clothed with long hairs; 
sessile spikelet 3-4 mm. long, linear to linear-lanceolate, about twice’as long as the internodes, 
the first scale hispidulous on the keels above, the intercarinal space depressed, the fourth 
scale 2-toothed at the apex, bearing a hispidulous usually somewhat contorted imperfect awn 
1-2 cm. long; pedicellate spikelet wanting, or present as a minute rudimentary scale, the 
pedicel as long as or a little exceeding the sessile spikelet. 
TYPE LOCALITY: Florida. 
DISTRIBUTION : North Carolina to Florida and Mississippi. 
7. Andropogon perangustatus Nash, in Small, Fl. SE. 
U.S. 62. 1903. 
Andropogon virginicus viridis slenophyllus Hack. in DC. Monog. Phan. 6: 411. 1889. Not 4. 
stenophyllus R. & S$. 1817. 
Stems 2-8 dm. tall, slender, the branches usually single, sometimes in pairs; leaf-sheaths 
glabrous; ligule 1-1.5 mm. long, rounded or acutish at the summit; blades 3 dm. long or less, 
