Panicum. CLXI. GRAMINEiE. 605 



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

 racemose; ahorlivc jlun-cr with one palea. — Tj. 7 "Wet meadows, Mid. and S. 

 States, Sept. 



4. P. PKDUNCULATUM. Tom 



St. dichotomously branched above, round, 3 — If hij^h; /r.t. |' widi*, taper- 

 ing to the point; shrnihs hispitl and jiapiUosc ; pfrmrlc compound, >mooih, (jn a 

 long peduncle, branches in pairs, raccmcd ; spilickts ovale, smooljj; upper jmlca 

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



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

 iwm. Mtthl.) — St. crospitose, mostly simple, hairy at the joints, erect, 10 — 15' 



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

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

 the lower; s/icuth.^ scabrous, hairy; pauide erect, rather few-flowered, the 

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

 pedunculate ; illumes veined, lower one .short, broad-ovate, obtuse ; palccc hard, 

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



G. 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 pilo.se, shorter than 

 the joints; pc(L elongated; panicles simple, few-flowered; spiLdets 6bovate ; 

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

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

 about equal to the superior glume. — Near Oneida Lake, K?iei$kern, Corm. 

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



* * Spikelets in hose panicles. 



7. P. CLANDESTiNUM. 



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

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

 lateral panicles; upper 'palea of the neutral flower obtuse. — % 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; jmnicle terminal, a little exserted from the sheath, 

 simple, pubescent; spikelets rather large, oblong-ovate; abortive flmcer 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 ba.se, an inch wide, with 

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

 sessile, branches flexuous, somewhat .spreading; spikelets oblong; abortive fiowcr 

 staminate. — 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- 

 pilo.se beneath, 3 — 6' long; sheaths hispid, villous on the margin, with no 

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

 simple branches; spikelets ovoid-globose; abortive jlower neutral. — Banks of 

 Connecticut river, Mass. July. 



11. P. PUBEscENs. Lam. (P. nitidum, /?. villosum. Gray.') 



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

 with a dense, villous, deflexcd pubescence; sheaths bearded at the throat; Ivs. 

 remote, linear-lanceolate, short, upper ones pubescent, lower villose ; panicle 

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

 ticillate, pubescent ; spikelets pubescent, rather small, at the extremity of the 

 branches; lower glume .'^inall, upper one 5- veined; abortive Jlaurr ixeulrtil, 5 

 longer than the upper glume, smooth. — Penn Yan, N, Y., SartwcU, Penn. to 

 Ohio, Sullivant! June. 



