pANicum. €LXI. GRAMINEiE. mi 



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

 •racemose; abortive Jmioct with one palea. — %.'{ Wet meadows, Mid. and. S. 

 -States. Sept. 



4. P. PEDTJNCULATUM. Tom 



St. dicholomously branched aljove, round, 3 — 4fhigh; Ivs. f wide, taper- 

 ing to the point J sJicaths liispid and papillose; panicle compound, smooth, on a 

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

 •of the abortive flower half as long as the lower. — %. Moist v/oods, N. Y. Jl. 



5. P. RECTUM. Roera. »fc Schultz. (P. involutum. Torr. P. depaupera- 

 tum. MiM.) — St. c£8spitose, 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; skealks sc'abrous, hairy; panicle erect, i-ather few-flowered, the 

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

 pedunculate ; glumes veined, lower one short, broad-ovate, obtuse j palea 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 ; skeafhs pilose, shorter than 



the joints; perl, elongated; panicles simple, lew-flowered; spikelets ohovate j 

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

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

 about equal to the superior glume. — Near Oneida Lake, Kiieiskern, Cona, 

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



* * Spikelets in loose panicles, 



7. P. CLANDESTiNUM. 



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



:S 6' by 1', lanceolate, subccrdate at base ; s/icalhs hispid, enclosing the short, 



lateral panicles; upper palea of the neutral flower obtuse. — Qj. Moist woodis, 

 Mass. and Mid. States. July, Aug. 



8. P. LATiFOLiuM. (P. scoparium. La.ni. ?) 



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

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

 simple, pubescent-, spikelets rather large, oblong-ovate; abortirc 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 fiexuous, somewhat spreading; spikelets eblong; abortive flower 

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

 July. 



10. P. MACR0CARP0N-. Torr. 



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

 pilose 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; adortive fl&ivcr nexUVcil. — Banks of 

 Connecticut river, Maps. July. 



11. P. puBEscENs. Lam. (P. nitidum, 0. villosum. Gray.) 



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

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

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

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

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

 branches ; 4ower glume small, upper one 5-veined; abortive fl.ouvr neutral, $ 

 longer than the upper glume, smooth.— Penn Yan, N. Y., Sariwell, Penn. tc 

 Ohio, SnllivaiU! June. 



