DiGiTARiA. TRIANDRiA. DIGYNIA. 155 



3. D. serotina Mich. : decumbent ; leaves and sheaths 

 very pubescent; spikes numerous, setaceous; spikelets all 

 pedicellate ; inferior glume very minute. M i c h. Fl. I. p. 

 46. Pursh Fl. 1.70. Muhl. Gram. p. 130. T>. vi/losa 

 Elliot t Sk. I. p. 132. Syhtherisma serothia Wait. Car, 

 p. 77. Paspalus serotinus F lug g.? Re em* 4^ S chult, 

 II. p. 305. 



Root perennial, creeping. Cubn 12 — 13 inches long, terete, hairy 

 at the joints, covering with a thick carpet the ground which it 

 occupies. Leaves linear- lanceolate, thin, and, with the sheaths, 

 very villous. Spikes 2 — 3 inches long. Interior ^/z^we" scarcely 

 one fourth the size of the superior, hairy along the margin. 

 Elliott. 



Hab. In New-Yoi4i. Muhlenberg. + 



4. D.Jiiifomiis Ell.: culm erect, filiform^ Jeaves soine- 

 what glabrous ; spikes 2 — 4, filiform erect; spikelets in threes, 

 all pedicellate ; calyx 1-valved, as long as the abortive floret, 

 p-ubescent. Elliott Sk. 1. p. 132. MuhL Grnnu p. 

 131. D.pilosa M i c h. FL I. p. 45 ? Pu rsh Fl. 1. p. 69. 

 PANicvyi Jlliforme L. iV i 1 1 d. Spec. L p. 360. Paspalus 

 JUiformis Flugg. Roem. <^ S chult, J J. p. 304. 



Hoot annual. Cuhn erect, simple, a foot ov 18 inches high ; joints 

 smooth. Leaves short, narrow-lanceolate, smooth beneath, a 

 little hairy above. Lower sheaths hairy. Spikes generally 2, 

 rarely 3 or 4 ; rachis flexuous and very narrow. Pedicel 

 bearing 2 or 3 spikelets, divided to the base. Glume acute, 

 3-nerved. Abortive f-oret, l-valved, 5-nerved, as long as the 

 perfect jioret, which is smooth and finely striate. 



Has. In dry gravelly soils, and in sandy woods. August. It 

 frequently occurs only with a single spike. 



53. ANDROPOGON. L. 



Flowers spiked. Spikelets in paii^, polygamous; 

 the inferior one abortive ^ (antheriferous or neuter,) on 

 a bearded pedicel; glumes and corolla frequently very- 

 minute or wanting. Superior spikelet sessile, 1-flovver- 

 Qd^ perfect; glumes subcoriaceous; corolla 2-valved, 

 shorter than the calyx, membranaceous; the inferior 

 valve generally awned. Gen.pl. 1566. JVutt. Gen. 

 I. p. 160. Juss. p. 30. Roem.^ S chult. Gen. 

 379. P. de Beauv. t. XXIII. f. 24 Trin. Agrost. 

 159. Anatherum, and Cymbopogon P. de B. 

 Pol LIN I A Sprengel. Beard-grass. 



