Paniclm. CLXI. GRAMINE^. 605 



at throat ; panicles large, pyramidal, terminal and axillary, smooth ; spikelets 

 racemose ; abortive fiower with one palea. — % 1 Wet meadows, Mid. and S. 

 States. Sept. 



4. P. PEDUNCULATUM. TOH'. 



St. dichotomously branched above, round, 3 — 4f high; Ivs. |' wide, taper- 

 ing to the point ; sheaths hispid and papillose ; panicle compound, smooth, on a 

 long peduncle, branches in pairs, racemed ; spikelets ovate, smooth; upper palea 

 of the abortive flower half as long as the lower. — %. Moist woods, N. Y. Jl. 



5. P. RECTUM. Roem. & Schultz. (P. involutum. Torr. P. depaupera- 

 tum. Muhl.) — St. casspitose, mostly simple, hairy at the joints, erect, 10 — 15' 



high; Ivs. lance-linear, erect, involute at the end, forming a long, slender, pun- 

 gent point, rather rough and hairy, sometimes smooth, upper ones longer than 

 the lower; sheaths scabrous, hairy; panicle erect, rather few-flowered, the 

 branches tortuous, in pairs, one longer with 2 spikelets ; spikelets rather large, 

 pedunculate ; glumes veined, lower one short, broad-ovate, obtuse ; paleoi hard, 

 whitish, shining, — N, Eng. 1 and Mid. States ! May, June. 



6. P. XANTHOPHYSUM. Gray, 



St. 12 — 15' high, glabrous, generally simple; Ivs. lanceolate, 3 — 6' by 

 5 — 7", acute, veined, nearly smooth, ciliate at base ; sheaths pilose, shorter than 

 the joints; ped. elongated; panicles simple, few-flowered; spikelets obovate ; 

 glumes pubescent, the inferior one acute, 3- veined, half the length of the many- 

 veined, superior one ; J^ 2-valved, ^ cartilaginous, obtuse, smooth and shining, 

 about equal to the superior glume. — Near Oneida Lake, Ktieiskern, Conn. 

 River, N. H. ! to Conn. ! June, July. 



* * Spikelets in loose panicles. 



7. P. CLANDESTlNUM, 



St. with short, axillary, appressed branches, 2 — 3f high, rigid, leafy; Ivs. 

 3 — 6' by 1', lanceolate, subcordate at base; sheaths hispid, enclosing the short, 

 lateral panicles; upper palea, of the neutral flower obtuse. — 1]. Moist woods, 

 Mass. and Mid, States. July, Aug. 



8. P. LATiFOLiuM. (P. scoparium. Lam. ?) 



St. nearly simple, with the nodes retrorsely pilose; Ivs. lance-ovate, clasp- 

 ing, somewhat pubescent; panicle terminal, a little exserted from the sheath, 

 simple, pubescent ; spikelets rather large, oblong-ovate ; abortive flower stami- 

 nate. — % Common in ditches, woods, &c., U. S, Readily known by broad, 

 short leaves. June, July. 



9. P. NERVOSUM. Muhl, 



St. simple, smooth at the nodes, 3 — 4f high; Ivs. oblong-lanceolate, 2 — 3' 

 long, smooth, a little ciliate on the margin, cordate at base, an inch wide, with 

 short sheaths; panicle much branched, smooth, many-flowered, pedunculate or 

 sessile, branches flexuous, somewhat spreading; spikelets oblong; abortive flou'cr 

 staminatc. — Bogs, N, Y. to Car. W. to 111. — Perhaps not distinct from the last. 

 July. 



10. P. MACROCARPON. Torr. 



St. erect, simple, straight, 2 — 3f high ; Ivs. linear-lanceolate, erect, sub- 

 pilose beneath, 3 — G' long ; shmths hi.spid, villous on the margin, with no 

 stipules; panicle rather compound, smooth, with few, spreading, flexuous, sub- 

 simple branches; splkckls ovoid-globose; abortive floicer ncinral. — Banks of 

 Connecticut river, Mass. July, 



11. P, punKscENs. Lam. (P. nitidum, /?. villosum. Gray.") 



St. 8 — 30' hiuh, simple or branched, erect, and with the sheaths, covered 

 with a dense, villous, (icflc.vcd pubescence; .sliraths In-arded at the throat; //•.<. 

 remote, lin('ar-lanre(jlate, slu)rt, upper ones pubescent, lower villose ; panicle 

 terminal, rather crowded, compound, sometimes rather loose, branches subver- 

 ticill.'ite, pubescent ; yjfikrhis pulM-scent, rather small, at the extremity of the 

 branches; lower i^tuwr small, upper one 5-veined; abortive flourr nc\\\vh\, t} 

 lonijer than the up])er glume, smooth, — Penu Yan, N. Y., SartirrU, Penn. to 

 Ohio, Suliivant ! June, 



