Panicum. CLXI. GRAMINE. 605 
at throat; panicles large, pyramidal, terminal and axillary, smooth; spikelets 
racemose; abortive flower with one palea.—2.? Wet meadows, Mid. and S. 
States. Sept. 
4. P. pepUNCULATUM. Torr. 
St, dichotomously branched above, round, 3—4f high; vs. 3’ wide, taper- 
ing to the point; sheaths hispid and papillose; panecie 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.—2| Moist woods, N. Y. Jl. 
5. P. rectuM. Roem. & Schultz. (P. involutum. Torr. P. depaupera- 
tum. Muhl.)—St. ceespitose, mostly simple, hairy at the joints, erect, 10—15! 
high; /vs. 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 ; glwmes veined, lower one short, broad-ovate, obtuse; palee hard, 
whitish, shining.—N. Eng.? and Mid. States! May, June. 
6. P. xanTHoPpHysuM. Gray. 
St. 12—15’ high, glabrous, generally simple; ws. lanceolate, 3—6’ by 
5—7", acute, veined, nearly smooth, ciliate at base; sheaths pilose, shorter than 
the ioints; ped. elongated; panicles simple, few-flowered; spikelets obovate ; 
glwmes 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, Kneiskern, Conn. 
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; Ws. 
3—6’ by 1’, lanceolate, subcordate at base; sheaths hispid, enclosing the shezt, 
lateral panicles; wpper palea of the neutral flower obtuse—2| Moist woods, 
Mass. and Mid. States. July, Aug. 
8. P. LaTiroLtium. (P. scoparium. Lam. ?) 
St. nearly simple, with the nodes retrorsely pilose; luvs. lance-ovate, clasp- 
ing, somewhat pubescent; panicle terminal, a little exserted from the sheath, 
simple, pubescent; sprkelets rather large, oblong-ovate; abortive flower stami- 
nate.—2, 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; lws. 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 flower 
staminate.—Bogs, N. Y. to Car. W. to Ill—Perhaps not distinct from the last. 
July. 
10. P. Macrocarpon. Torr. 
St. erect, simple, straight, 2—3f high; Jvs. 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; abortive flower neutral—Banks of- 
Connecticut river, Mass. July. 
11. P. pugescens. Lam. (P. nitidum, @. villosum. aor), 
St. 8—30’ high, simple or branched, erect, and with the sheaths, covered 
with a dense, villous, deflexed pubescence; sheaths bearded at the throat; vs. 
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 small, upper one 5-veined; abortive flower neutral, $ 
longer than the upper glume, smooth—Penn Yan, N. Y., Sartwell, Penn. to 
Ohio, Suilivant! June. 
