IMARRHENA. TRIANDRTA. DIGYNIA- nB- 



distinct genus by i? a/i n e sgue^ though he never, as far as 

 1 can learn, defined its characters. It strongly resembles some 

 species of Uniola, particularly U. gracilis^ which species ap- 

 pears to connect it with Ceratochloa. 



34. DACTYLIS. L, 



Spikelets aggregated into a unilateral head, many- 

 flowered. Calyx shorter than the florets ; one of the 

 glumes larger, carinate and pointed. Inferior valve of 

 the corolh carinate, emarginate, nnucronate ; superior 

 valve somewhat conduplicate. *S^. pi. 117. Nutt* 

 Gen. I. p. 73. Ju s s. p. 31. P. cle Beauv. t. XVII. 

 f. 5. JRoem.y Schult. Gen. 321. Trin.Agrost. 

 94. Orchard-grass. 



D. glomerata L. : panicle secund, glomerate ; leaves ca- 

 rinate. WiLld. Spec. 1. p. 408. S m i t h Fl. Brit. I. p. 1 U. 

 Eng. Bot. t. 335. P ur sh Fl. I. p. 84. Muhl. Gram. 

 I. p. 36. Elliott Sk. 1. p. 155. 



Root perennial. Culm 2 — 3 feet high. Leaves broadly-linear, 

 and, as well as the sheaths, rather scabrous. Stipule elongated, 

 lacerate. Panicle contracted both before and after flowering. 

 Sfiikelets in thick ovate clusters on the extremity of each 

 branch. Glumes very unequal; the inferior one narrower; 

 the other lanceolate, strongly ciliate on the keel. Inferior 

 valve of the cor'Ala carinate, ciliate on the keel and margin, 

 scabrous on the sides ; apex produced into a short cusp ; su- 

 perior valve with ciliate margins. Anthers very large, yellow. 

 Hab. Common in fields, meadows, &c. May — June. Natu- 

 ralized : a native of Europe. 



35. DANTHONIA. De Cand. 



Calyx 2 — 5-flowered, longer than the florets ; glumes 

 cuspidate. Corolla bearded at the base ; inferior valve 

 2- toothed, with a twisted awn between the teeth j su- 

 perior valve obtuse, entire. P. de Beaiiv. 1. c. p. 92. 

 t. XVIII. f. 7. Nutt. Gen. I. p. 71. Roe?n. £>' 

 Schult. Gen. 332. Trin. Agrost. 97. Avenge 

 spp. L.J Mich., &c. Panicle spiked. 



D. spicata P. de B. : panicle simple, appressed ; spike- 

 lets 7 — 9, about 7-tlowered ; inferior valve of the corolla 

 hairy ; leaves subulate ; lower sheaths hairy at the throat, 

 Roem. ^ Schult. U. p. e90. J^ ut t. Ge7i. ]. c. Avena 

 spicala L. Sp, pi. l\d. Willd. Spec. I. p. 453. P ur s h 

 FL I. p. 86. MuhL Gram, p. 184. 



