PART 2, 1912] POACEAE 147 
Stems up to 1 m. tall or more, erect; leaf-sheaths glabrous; blades up to 3 dm. long and 
4 mm. wide, glabrous, except sometimes on the upper surface and near the base; panicle 
contracted, 1-2 dm. long, its branches erect or nearly so; spikelets 4-5 mm. long. 
TYPE LOCALITY: Venta del Camaron, near Acapulco, Guerrero. 
e ee aga Southern Mexico to Costa Rica; Cuba ; also in northern South America and 
rinida 
ILLUSTRATION: H.B.K. Nov. Gen. & Sp. pl. 29. 
42. ANTHAENANTIA Beauv. Agrost. 48. 1812. 
Aulaxanthus Ell. Bot. S.C. & Ga.1: 102. 1816. 
Aulaxia Nutt. Gen. 1: 47, 1818. 
Erect perennial grasses with numerous spikelets arranged in a narrow or contracted 
panicle. Spikelets articulated to the pedicel below the scales, 1- or 2-flowered, ovate, sometimes 
shortly acuminate. Scales 3 (the first wanting), the 2 outer equal, or nearly so, membranous, 
the internerves folded, densely clothed externally with long hairs, empty, or the third one 
enclosing a palet and sometimes also a staminate flower; fourth or fruiting scale equaling or a 
little shorter than the third, boat-shaped, membranous, when mature somewhat rigid or slightly 
indurated and chestnut-brown, enclosing a shorter palet which is not free at the apex, and 
a perfect flower. Stamens 3. Styles distinct. Stigmas plumose. 
Type species, Phalaris villosa Michx. 
Leaf-blades linear, the lower ones 3-4 mm. wide; plant often purple or purplish. 1. A. rufa. 
Leaf-blades narrowed toward the summit, the lower ones 5-10 mm. wide; plant green. 2. A. villosa. 
1. Anthaenantia rufa CEll.) Schultes, in R. & S. Syst. Veg. 
Mant. 2: 258. 1824. 
Aulaxanthus rufus Ell. Bot. 8. C. & Ga. 1: 103. 1816. 
Panicum rufum Kunth, Rév. Gram. 35. 1829. 
Monachne rufa Bertol. Mem. Accad. Bologna 2: 596. 1850. 
Leptocoryphium obtusum Steud. Syn. Gram. 34. 1854. 
Leptocoryphium Drummondi C. Muell. Bot. Zeit. 19: 314. 1861. 
Anthaenantia rufa scabra Nash, in Small, Fl. SE. U. S. 79. 1903. 
Smooth and glabrous, often purple. Stems 4-10 dm. tall, from a running rootstock; 
leaf-sheaths shorter than the internodes; blades erect, linear, obtuse, 2-5 mm. wide, those at 
the base and on the innovations 2-4 dm. long, those on the stem 2 dm. long or less; panicle 
contractec, 8-20 em. long, 1-2 em. broad; spikelets numerous, 3.5-4 mm. long, the second 
and third scales about equal in length, 5-nerved, the hairs about 1 mm. long, the third enclosing 
a palet and often also a staminate flower, the fruiting scale as long as or a little shorter than 
the others. 
TYPE LOCALITY: On the Edista River, South Carolina. 
DISTRIBUTION: In moist pine lands, South Carolina to Florida and Louisiana. 
ILLUSTRATIONS: Bull. U. S. Dep. Agr. Agrost. 17: f. 336; 20: f. 20; tard Comm. Agr. 1888 : 
Bot. pl. 6; Ell. Bot. S.C. & Ga. pl. 6, f.7; Mem. Accad. Bologna 2° BL. 41, f. 1. 
2. Anthaenantia villosa (Michx.) Beauv. Agrost. 151. 1812. 
Phalaris villosa Michx, Fl. Bor. Am. 1: 43. 1803. 
Panicum Erianthos Poir. in Lam. Encyc. Suppl. 4: 284. 1816. 
Aulaxanthus ciliatus Ell. Bot. S.C. &Ga.1: 102. 1816. 
Panicum ignoratum Kunth, Rév. Gram. 35. 1829. 
Oplismenus Erianthos Kunth, Rév. Gram. 45. 1829. 
Smooth and glabrous, green. Stems 5~15 dm. tall, from a running rootstock; leaf-sheaths 
shorter than the internodes; blades erect, narrowed toward the apex, acute or somewhat obtuse, 
3 dm. long or less, 1 cm. wide or less; panicle contracted, 8-20 cm. long, 1-2 cm. broad; spike- 
lets 3-4 mm. long, the 2 outer scales 5-nerved, the hairs about 0.6 mm. long, the second scale 
equaling or a little shorter than the third which encloses a palet and sometimes also a staminate 
flower, the fruiting scale about equaling the third. 
TYPE LOCALITY: In sandy woods, Carolina. 
DISTRIBUTION: South Carolina to Florida and Texas. 
ILLUSTRATIONS: Beauv. Agrost. p/. 10 of: 7; Bull. U. S. Dep. Agr. Agrost. 17: f 337; Kunth, 
Rév. Gram. £/. 20; Beal, Grasses N. Am. 7. 23. 
