PANicuM. TRIANDRIA. DIGYNIA. 141 



Root annual. Culm 2 — 4 feet high, terete. Leaves broad and 

 flat. Panicle dense» at length spreading. Inferior glumes 

 smaller, acaminate ; the superior 5-nerved, terminating in a 

 briatle several times its length. Abortive Jloret 2-valved; the 

 inferior valve with a long bristle at the tip ; superior half the 

 length of the other, acute, membranaceous. Perfect floret 

 smooth and coriaceous. 



Hab. In moist meadows, along ditches, and in cultivated 

 grounds ; common. August — September. It varies with un- 

 armed glumes. Introduced. Cock's-foot grass. 



2. F. hispidum Muhl.: panicle compound, nodding; 

 racemes alternate ; glumes terminating in hispid bristles ; 

 sheaths hispid. Muhl. Gram, p. 107. P. Cms galli 0. 

 hispidtim Elliott Sk. I. p. 114. P. Walleri Pursh FL 

 I. p. 6G. nee M uhl, &l E 1 1. P. muricatum Mich. Fl. 1. 

 p. 47? 



Root annual. Culm 3 — 4 feet high, erect, thick and succulent. 

 Leaves broad, flat. Panicle dense, 4 — 6 inches long. Flowers 

 as in the preceding species, but never unarmed. 



Hab. Along ditches near the salt-water, ard in salt-marshes. 

 September — October. It much resembles P. Cms galli, and 

 may be only a variety of that species ; but it is easily distin- 

 guished by its hispid sheaths. 



3. P. clandesfinum L. : culm with short axillary branches; 

 leaves broad-lanceolate, cordate at the base ; sheaths hispid, 

 enclosing the short panicles ; abortive floret neutral, 2-va!ved ; 

 superior valve obtuse. Sp. pi. 86, Willd. Spec, 1. p. 351. 

 Muhl. Gram. p. 110. R o em. ^ S chult. II. p'. 442. 

 P. latifolium 0. clandestinum Pursh Fl. 1. p. 68. 



Root perennial, fibrous. Culm 2 — 3 feet high, erect and rigid, 

 leafy ; branches appressed. Leaves 3 — 4 inches long, 1 inch 

 broad, expanding, strongly nerved, scabrous on the margin, 

 ciliate at the base. Sheaths hispid, with horizontal hairs arising 

 from little fiafiillie situated in the furrows between the strice. 

 Panicles terminal and lateral, concealed in the sheaths of the 

 leaves, simple, few-flowered. Sfiikelets ovate, obtuse, pubes- 

 cent. Glumes ovate, acute, loose; the superior obscurely 

 7-nerved. jibortive floret 2-valved ; inferior valve resembling 

 the glumes ; superior valve membranaceous, oblong. Perfect 

 floret shorter than the calyx, shining. Stamens 3 ; anthers 

 purple. Styles 2 ; stigmas large, plumose, exserted, purple. 

 Seed white, ovate, shining. 



Hab. In shady, moist thickets and woods. July — August. 



A very distinct species from P. latifolium, of which it was 

 considered a variety by P u r s h. 



4. P. peduncidatum*: culm dichotomous ; leaves broad- 

 Unceolate, slightly hairy above, attenuate ; sheaths hispid 

 and papillose ; panicle long-pedunculate, compound, smooth ; 



