124 TRIANDRIA. DIGYNTA. clratochlgi, 



rets acuminate, unarmed ; sheaths bearded at the throat, the 

 lower ones hairy; root fibrous. R o e m. <^ Schult. II, 

 p. 596. Festuca unioloides Willd. Enum, h. Berol. L 

 p. 115. Hort. Berol. I. p. 3. t. 3. Pursh Fl. I. p. 84» 

 (No. 4, specitic name omitted) Muhl. Gram, p. 161. El- 

 liott Sk. I. p. 171. 



Root annual or perennial. Culm a foot and a half high. Leaves 



linear-lanceolate, pubescent, nerved, Stifiule ovate. Panicle 



small ; branches in pairs. Sfiikelets oblong-lanceolale ; pedicels 



han-y Glumes nearly equal, lanceolate, acuminate, striate. 



Corolla unequal, lanceolate, acuminate, margined. Stamens 3. 



Mti/il. 

 Hab. In rich bottom lands. Pennsylvania to Carolina. July— 



August. Pursh. % 



I tiave never seen a specimen of this plant: by the figure in 



the Hort. Berol. it resembles a Bromus in habit very much. 



Allied to Festuca stricta P o i r., of the Island of Bourbon, 



33. DIARRHENA. Rafinesgue, 



Calyx 2-valved, very unequal, 2 — 5-fiowered, rigid ; 

 glumes acuminate, mucronate. Coro//a cartilaginous ; 

 inferior valve entire, broader, cuspidate; superior valve 

 much shorter, en\arginate. Seed coated, as long as the 

 superior valve of the corolla. jYectaries ovate, ciliate, 

 P. de Beauv. t. XXV. f. 2. Roem, h' Schult. 

 Gen. 117. Tr'in. A^rost. 5. Diarina JRaJl in 

 lit. FESTUCiE sp. Alich. Panicle very simple. 



D. americana P. de B. R o e m. <^ S c hu 1 1, \. ip. 289. 

 D.festucoides R af. in Med, Rep. II. p. 352. (sine descript.) 

 Festuca dian.ira M i c h, Fl. I. p. 67. t. 1 0. Will d. Enum, 

 h. Berol. ].ip.\\Q. JVm//. Gen. I. p. 72. Pursh Fl. I. ^. 83. 

 Root perennial. Culm erect, almost naked, slender, slightly 

 compressed, scabrous on the upper part. Leaves few, nearly 

 radical, broad, flat, and, as well as the s/ieaths, a little pubescent.. 

 panicle racemose ; branches few-flowered, appressed. Sfiike- 

 lets (in my specimens) about 2-flowered ; florets, diverging. 

 Inferior glume lanceolate, carinate, ciliate on the margin, not 

 half the length of the superior glume, which is broader and 

 5-nerved. Corolla smooth ; inferior valve 3-nerved, prolonged 

 at the tip into a very sharp point ; superior valve impressed on 

 the back and hicarinate ; keels scabrous and green ; margin a 

 little ciliate. Seed oblong-cylindrical, obtuse, not sulcate. JVec- 

 taries very conspicuous, obtuse and ciliate. Statnens 2 — 3. 

 Hab. Oil the banks of the Ohio ; nearly within the limits of this 

 work. R afi n e s q ue. 



Tiiis remarkable grass, which was referred to Festuca by 

 Michaux^ with a mark of doubt, was first proposed as a 



