108 TRIANORTA. DTGYNTA. poa. 



deeply cleft, even when young. Siamens 3 ; anthers pale yel- 

 low. Hiligmas white. 

 Hab. In shady swamps. In the pine-barrens of New-Jersey. 

 On the I^lanrl of N^iw-Y )rk. D ■erfiekl, Massachusetts. C o o- 

 l e y. Williamstown. D e we y. 



This plaiu I erroneously referred to JVu 1 1 a I Ts genu$ 

 WiN'DSORTA (Tricuspis P. de Be a uv.) in the Catalogue of 

 the Piai.ts of N vv-York; but I am now convinced it is a ge- 

 nuine species of PoA. 



4. P. nqnatica /5. americana*: panicle erect, semiverti- 

 ci^late, diff ise ; branches flexuous, smooth ; spikelets linear, 

 6 — 8-liowored ; florets ovate, obtuse, free ; leayes broad- 

 li'iear and, as well as the sheaths, smooth. P. aquatica 

 P nrs h Fl. \. p. 80. P. arundinacca M. a Bieb er st, 

 Roem (^ S c A w / f. II. p. .559. 



Boot perennial. Culm 4—5 feet high, thick and reed-like, very 

 sm-joth, leafv. Leaves a foot or more in length, nearly half 

 an inch hi iv), Flai, smooth and membranaceous. Sii/iule 

 short, obtuse, abruptly acuminate. Panicle 8—12 inches long, 

 at first contracted and a little nodding, but at length much ex- 

 panded ; branches about 4 at each joint, flexuous and much 

 divided. Sfiikelets generally purple, 6-, rarely 9-flo\vered. 

 Calyx unequal ; glumes ovate, rather obtuse ; tlie superior as 

 long again as the inferior. Corolla oblong ; inferior valve 

 7-i»erved; the superior one as long again as the other. Sta- 

 mens 3 ; anthers yellow. 



Hab la wet meadows Deerfield, Massachusetts. Coo ley. 

 Williamstown. Dewey. Near Schenectadv, N^•w-York. 

 Dr. L. C Berk. Fairfield. Had ley. Near Montreal, 

 Canada. Dr. Paine. August. 



5. P. marUima liuds.: panicle branched, somewhat 

 crowded ; spikelets about 5-flowered, terete ; florets rather 

 obtuse, indistinctly 5-nerved 5 root creeping. Smith FL 

 Brit. 1. p. 97. En^. Bot. 1140. W 1 1 1 d. Spec. I. p. 396. 

 Roem. ir Schult. U. p. 360. Muhl. Gram. p. 148. 



Root perennial. Culm about a foot high, somewhat geniculate, 

 terete. Leaves involute, a little glaucous, scabrous on the 

 margin. Utifiule ovate, rather obtuse. Panicle erect; branches 

 in pairs, angular, scabrous, somewhat flexuous. Sfiikelets 

 linear and nearly terete, purplish ; florets at length spreading. 

 G'nmes unequal, acute; the inner one broader and 3-nerved. 

 Corolla unequal ; inferior valve ovate, obtuse, obscurely 

 3-toothed at the tip, woolly at the base ; superior valve ciliate 

 on the margin. Stamens 3 ; anthers large, yellow. Stigmas 

 white. JVtctaries ovate, distinct. 



Hab "Cambridge, near Boston, Massachusetts. June. Bige- 

 loiv. Resembles the European plant in every respect. 



6. P. hrevifoUa Muhl.: panicle loose; branches in 

 pairs, horizoutal; calyx 3 — 4-flowered ; corolla pubescent; 



