86 NORTH AMERICAN FLORA [VoLtumyE 17 
pedicellate spikelet nearly obsolete, on a linear curved pedicel equaling or nearly as long 
as the sessile spikelet. 
TYPE LOCALITY: Brazil. 
DISTRIBUTION : Cuba and Brazil. 
ILLUSTRATION : Mart. Fl. Bras. 23: p/. 71. 
4, Coelorachis tuberculosa Nash. 
Manisuris tubercuiosa Nash, Bull. N. Y. Bot. Gard. 1: 430. 1900. 
Stems tufted, much compressed, 8-12 dm. tall; leaf-sheaths much flattened, broad, 
keeled; blades 3 dm. long or less, 3-7 mm. wide; racemes finally exserted, 6-10 cm. long, 
straight, the rachis barely if at all contracted at the nodes; sessile spikelet about 4 mm. 
long, about equaling the internode, the first scale transversely wrinkled, or very rarely 
without wrinkles, the wrinkles short, tubercle-like, irregularly disposed; pedicellate spike- 
let reduced to 1 or 2 short scales about one half the length of the linear pedicel, which isa 
little shorter than the sessile spikelet and curved around its margin. 
TYPE LOCALITY: Eustis, Lake County, Florida. 
DISTRIBUTION: Peninsular Florida. 
5. Coelorachis rugosa (Nutt.) Nash. 
Rottboellia rugosa Nutt. Gen. 1: 84. 1818. 
Rottboellia corrugata Baldw. Am. Jour. Sci. 1: 355. 1819. 
Rotiboellia rugosa Chapmani Hack. in DC. Monog. Phan. 6: 308. 1889. 
Manisuris rugosa Kuntze, Rev. Gen. 780. 1891. 
Manisuris Chapmant Nash, in Small, Fl. SE. U. S. 56. 1903. 
Stems tufted, much compressed, 6-15 dm. tall, stout; leaf-sheaths much flattened, 
broad, keeled ; blades 4 dm. long or less, 10 mm. wide or less; racemes exserted or some- 
what included at the base, sometimes spreading, 4-8 cm. long, straight or a little curved, 
the rachis-internodes often much contracted at the base, glabrous or puberulent; sessile 
spikelet 3.5-5 mm. long, about equaling or a little exceeding the internode, the first scale 
often 2-toothed at the obtuse apex, strongly transversely wrinkled, the wrinkles much 
elevated and often extending across the entire width of the scale, the longitudinal ridges 
usually rather prominent ; pedicellate spikelet smaller, of 2 scales, empty, or sometimes 
bearing a staminate flower. 
TYPE LOCALITY: Florida. 
DISTRIBUTION : Southern New Jersey, Delaware, and Maryland to Florida and Texas. 
ILLUSTRATIONS: Bull. U. S. Dep. Agr. Agrost. 17: £306; Britt. & Brown, Il. Fl. f 225. 
6. Coelorachis tessellata (Steud.) Nash. 
Roitboellia tessellaia Steud. Syn. Gram. 362. 1855. 
Rottboellia corrugata Chapm. F1. S. U. S. 579. 1860. Not R. corrugaia Baldw. 1819. 
Manisuris tessellata Scribn. Bull. U. S. Dep. Agr. Agrost. 20: 20. 1900. 
Stems tufted, much compressed, 8-12 dm. tall, stout; leaf-sheaths much flattened, 
broad, keeled; blades 4 dm. long or less, 3-8 mm. wide; racemes finally exserted, 6-12 
em. long, straight, the rachis barely if at all contracted at the nodes; sessile spikelet about 
5 mm. long, a little exceeding the internode, the first scale deeply pitted, the pits quad- 
rangular; pedicellate spikelet of 1 or 2 scales, about one half as long as the linear straight 
pedicel, which is shorter than the sessile spikelet. 
TYPE LOCALITY : Louisiana. 
DISTRIBUTION : Georgia and Florida to Louisiana. 
ILLUSTRATIONS: Bull. U. S. Dep. Agr. Agrost. 17: f. 305; 20: f/f. 9. 
7. Coelorachis ramosa (Fourn.) Nash. 
Apogonia ramosa Fourn. Mex. Pl. Gram. 63. 1881. 
Rotlboellia aurila stigmosa Hack. in DC. Monog. Phan. 6: 311. 1889. 
Stems up to 2 m. tall, branched above, smooth and glabrous ; leaf-sheaths compressed, 
keeled, smooth and glabrous; blades flat, linear, up to 6 dm. long, less than 1 cm. wide, 
glabrous; racemes up to 1.5 dm. long, 2.5-3 mm. in diameter, included at the base or 
somewhat exserted ; sessile spikelet about 4 mm. long, including the callus, the first scale 
elliptic, deeply emarginate at the apex, broadly winged from near the base, marked on the 
