TRTCHOC'HLOA. TRIANDRIA. DIGYNTA. 93 



Hort. Monsp. 18. Roem, ^ Schult. Gen. 238. 

 PoDosEMUM Desv. p. de Beaiiv, Jgrost. p. 29, 

 t. VIII. f. 1—3. Stip^ spp, Z. 



T. capillaris De Cand.: leaves convolute-filiform, 

 smooth ; panicle diffuse, capillary, very slender ; pedicels 

 longer than the awns ; awns 3 — 4 times the length of the 

 flower. Roem. <^ Schult, 11. p. 384, Stipa capillaris 

 Lam. III. n. 790. S. sericea Mich. FL L p. 54. P u r s h 

 Fl. I. p, 73. S. diffusa W alt. Car. p. 78, Agrostis se- 

 ricta Muhl. Gram. p. 64, Elliott Sk. I. p. 135. 



Root perennial. Culms cespitose, erect, about 2 feet high, very 

 slender. Leaves a foot and a half long, erect, filiform towards 

 the apex. Sti/tule membranaceous. Panicle purple, 8 — 10 

 inches long ; branches in pairs, much divided and nearly as 

 fine as human hairs, a little flexuous. Calya: less than half the 

 length of the corolla; glumes lanceolate, one of them with an 

 awn at the extremity about its own length. Corolla with nearly 

 equal valves; the inferior valve gradually produced into a ca- 

 pillary awn ; superior valve acuminate, somewhat pilose at the 

 base. Stamens 3. Sdgmas purple. Seed oblong. 



Hab. In the sandy pine woods of New-Jersey. Deerfield, Mas- 

 sachusetts. Dr.Cooley. September — October. 



An elegant and delicate grass, with large, glossy, purple 

 panicles. It is very properly separated from Stipa by Z)<? 

 Candolle and Be auv ois. To Agrostis it is much 

 more nearly related. Trichochloa inexpansa et polypogon 

 oi De Cand. and Roem. 13" Sc hiilt. I.e. appear to be 

 only varieties of this species. 



13. ARUNDO. L. 



Calyx 2-valved, unequal, membranaceous. Corolla 

 jnembranaceous, surrounded with hairs at the base; 

 inferior valve mucronate, or slightly awned ; supe- 

 rior valve sometimes with a pencil-form rudiment at 

 the base. Gen. pi. 124. Juss. p. 32. Trin. 

 Agrost. 29. Cal AM AGROSTIS lioth. P. de 

 Be auv. t. V. f. 9. Nu 1 1. Gen. I. p. 45. Flowers 

 panicled. 



1 . A. canadensis M i c h. : panicle oblonq:, loose ; glumes 

 scabrous, pubescent, as long as the corolla ; corolla awned on 

 the back ; hairs at the base equalling the valves ; culm and 

 leaves smooth. M ic h. Fl. \. Tp.l3. P ur s h FL ). v. i^'u 

 Roem. ir Schult. I. p. 509. A.confinis Willd.Enum, 

 hort. BeroL 1. p. 127. (fide Muhl.) Roem, <^ be hull. 



