Parr 1, 1909] POACEAE 91 
1. Erianthus divaricatus (1,.) Hitche. Contr. U. S. Nat. 
Herb. 12: 125. 1908. 
Andropogon divaricaium L,. Sp. Pl. 1045. 1753. 
Andropogon alopecuroides V,. Sp. Pl. 1045. 1753. 
Erianthus alopecuroides Ell. Bot. S. C. & Ga. 1: 38. 1816. 
Erianthus giganteus Muhl. Deser. Gram. 192. 1817. 
Evianthus saccharoides Michauxiit Hack. in Mart. Fl. Bras. 23: 257, in part. 1883. 
Erianthus alopecuroides hirsutus Nash, in Small, Fl. SE. U. 8. 55. 1903. 
Stems 1.5-3 m. tall, the apex, panicle-axis, and often also the nodes, clothed with lon g 
silky appressed hairs ; leaf-sheaths glabrous or hirsute; blades 1.5-7 dm. long, 5-25 mm. 
broad, hirsute above near the base; panicle 2-3 dm. long, 5-10 cm. broad, oblong, its 
branches erect-ascending, the larger 4-11 cm. long; spikelets rather crowded, about one 
half as long as the basal hairs and one half again as long as the internodes; outer 2 scales 
about 6 mm. long, pilose with hairs less than one and a half times as long as the scales; 
fourth scale 2-cleft at the apex, the teeth acuminate, the awn 12-16 mm. long, the included 
portion a tightly spiral column, the remainder loosely coiled. 
TYPE LOCALITY: North America. 
DISTRIBUTION : Southern New Jersey to Florida and Texas. 
ILLUSTRATIONS: Bull. U, S. Dep. Agr. Agrost. 17: /..304,; Britt. & Brown, Ill. Fl. fi 271. 
2. Erianthus contortus Ell. Bot. S.C. & Ga. 1: 40. 1816. 
Erianthus alopecuroides contortus Vasey, Grasses U.S.17. 1883. 
Erianthus saccharoides contortus Hack. in DC. Monog. Phan. 6: 132. 1889. 
Erianthus Smaliii Nash, Bull. N. Y. Bot. Gard. 1: 429. 1900. 
Stews 1-2.5 m. tall, the nodes often pubescent with readily deciduous hairs, the sum- 
mit and panicle-axis glabrous or appressed-pubescent ; leaf-sheaths smooth or rough, some- 
times hirsute at the apex; blades 1.5-8 dm. long, 5-20 mm. wide, smooth or rough; pan- 
icle 1.5-4 dm. long, 3-6 cm. wide, its branches erect, the larger 4-10 cm. long; spikelets 
crowded, equaling but not exceeding the basal hairs and about one half as long again as the 
internodes ; outer 2 scales 7-9 mm. long, pilose with long hairs, the fourth scale 2-cleft at 
the apex, the teeth long and subulate, the awn 1.5-2.5 cm. long, the included portion spiral 
at the base, the remainder loosely spiral. 
TYPE LOCALITY: Savannah, Georgia. 
DISTRIBUTION: Delaware (?) and Maryland to Florida and Texas. 
ILLUSTRATION : Bull. Tenn. Exp. Sta. 7: fl. 1, f. #. 
3. Erianthus Tracyi Nash, Bull. Torrey Club 24: 37. 1897. 
ie 2-4 m. tall, the summit and nodes, together with the panicle-axis and top of the 
othe’ wise glabrous sheaths, appressed-pubescent with long silky hairs; leaf-sheaths shorter 
than the internodes; blades 5 dm. long or more, 1.5-3 cm. broad, very rough, pilose above 
at the base; panicle 3-5 dm. long, 8-12 cm. wide, oblong, its pubescent branches erect- 
ascending, the larger 1-1.5 dm. long; spikelets crowded, less than one half as long as the 
‘basal hairs and one half again as long as the internodes; outer 2 scales 5-6 mm. long, pilose 
with hairs twice as long as the scale; fourth scale entire or somewhat 2-toothed at the apex, 
the awn 1.5-2 cm. long, straight or slightly flexuous. 
TYPE LOCALITY: Starkville, Mississippi. 
DISTRIBUTION: Mississippi and Louisiana. 
4. Erianthus saccharoides Michx. Fl. Bor. Am. 1: 55. 1803. 
Anthoxanthum giganteum Walt. Fl. Car. 65. 1788, Not Erianthus giganieus Mubl. 1817. 
Saccharum giganteum Pers. Syn. Pl. 1: 103. 1805. 
Saccharum alopecuroideum Nutt. Gen. 1: 60. 1818. 
Andropogon Erianthus Link, Hort. Berol. 1: 243. 1827. 
Erianthus saccharoides Michauzti Hack. in Mart. FI. Bras. 23: 257. 1883. 
Erianthus saccharoides genuinius Hack. in DC. Monog. Phan. 6: 130. 1889. 
Erianthus compactus Nash, Bull. Torrey Club 22: 419, 1895. 
Stems 1-3 m. tall, the summit and nodes appressed-pubescent with long silky hairs ; 
leaf-sheaths glabrous or hirsute ; blades 1.5-7 dm. long, 6-25 mm. wide, usually hirsute ; 
panicle 14 dm. long, oblong to oblong-elliptic; spikelets 4-6 mm. long, the outer 2 scales 
