786 Oedeb 156.— GKAMISB^ 



If; Iys. subulate, soalDrous, 2 to i' long; sheaths glabrous, longer than the jointa; 

 pan. very simple, the few, solita/ry, small spihdeis on very long setaceous pedicels ; 

 lower glume subulate ; sterile pale single, as long as the glume, a little longer 

 than the fertile flower, — Dry, sandy soils, rare, N. Car. to Ga. 



13 P. villosum Ell. ViUoiis throughoiU with soft white hairs; culm geniculate 

 below, 1 to 2f ; Ivs. flat, erect, 2 to 3' by 3 to 4" ; sheaths much shorter than the 

 joints; pan. small (2 to 3' long), loose; spikeleis oval, 1" long, green ; lower glume 

 roundish, \ as long as the t-veined, upper one, which equals the single, sterile 

 pale and fertile flower.^Evergreen in damp places, S. States (Peay, &c.). Apr., 

 May. 



14 P. oiliatiflorum. Fbinsed Grass. Culm erect, strict, 1 to 3f, glabrous; 

 Ivs. erect, long, linear, flat, narrow, scarcely distinct from their sheaths; pan. 

 virgate, subsimple, 3' long; spikelets pedicellate, oval, the glume and lower 

 abortive pale obtuse, subequal, the 5 veins cihate-fringed with silky, purplish 



■ hairs ; upper pale much smaller, oblong ; fertile pales thinly chartaoeous, brown 

 or blackish when mature. — Varies with the leaves more or less hairy, and the 

 curious silk fringe of the spikelets more or less copious. In pine barrens, S. 

 States. Sept. (Phalaris villosa Mx. Aulaxaijthus oiliatus and rufa'Ell. P. 

 ignoratum Kth., an absurd name which we venture to discard.) 



15 P. diohotomum L. Culm at first subsimple with a smgle terminal panicle, 

 becoming more or less branched, with lateral, subsimple panicles ; Ivs. lanceolate, 

 1 to 4' by 2 to 4" or 5", hairy or smooth, as likewise the sheaths; terminal pan. 

 exserted, often long-pedunculate, small (1 to 3' long), oval ifi outline, loosely few- 

 flowered; spikelets small' (about J" long), oval or roundish; lower glume very 

 small, upper equaling the sterile pale and fertile flower , upper sterile J to J as 

 long as the lower, scarious, bifld. — 1[ Common everywhere, in meadows, fields 

 and woods. Jn. — Sept.— The following are the more striking forms of this ex- 

 ceedingly variable species (which includes P. nodiflorum, lax;iflorum, nitidum 

 Lam., barbulatum Mx., sphserocarpa iluhl., lanuginosum, ensiforum EIL, &c.). 



;0. NITIDUM. Smooth and shining; spikelets pale purple; upper pale very 



short. 

 y. SPHjEROciEPUM. Hairy ; Ivs. suberect ; spikelets dark purple ; upper pale 



deeply bifid. 

 6. E-iEBULATtTJi. Taller ; nodes with a ring of retrorso hairs ; Ivs. spreading ; 



spikelets purplish ; upper pale entire. 

 e. LjVNUqinosum. 'Woolly ; Ivs. linear-lanceolate ; spikelets green ; upper pale 



elongated, very obtuse. Approaches the next species. 



16 P. depauper^tum Muhl. Culm csespitous, erect, 9 to 12' high, simple above 

 the base ; ks. linear, rigidhj erect, lower short, upper about 5' by 2-J-" ; pan. 

 simple with ascending branches, the peduncle very short or becoming very long ; 

 spikelets green, oval, acute, § to 1" long ; outer glume roundish, ^ as long as the 

 inner, l-veinod one ; upper neutral pale (always 7) bifld, half as long as the lower. 

 — Hilly woods, N. States and Can. Jn. (P. rectum R. & S.) 



p. IKV0LUIU3I. Lvs. involute, ending in a long, rigid point. (P. involutum, 

 Torr.) 



17 P. pauoiHorum BU. Culm mostly erect, at length, somewhat decumbent 

 and branched ; lvs. erect, linear-lanceolate, faintly D-veined, tapering to near the 

 base ; 3 to 5' by 5 to 7", sparingly hirsute as well as the close sheaths ; pan. ex- 

 serted, simple, raceme-like, few-flowered; Spikelets 10 or more, obovate, obtuse, 

 1" long; lower glume iroad-ovate, J as long as the upper one; upper neutral paio 

 similar to the lower. — "Wet or shady places, Mid., "W. and S. States. Jn., Jl. 



18 P. pub^scens Lam. Culm slender, finally branched, glabrous, 2 to 3f long ; 

 lvs. lanoe-linear, 9-veined, 3 to 6' by 3 to 5", clothed Tfith reflexed hairs as well 

 as the open sheaths; pan. small, expanded, few-flowered, pubescent; spikelets 

 large'(lj'' long), hairy, oval, obtuse, green; outer glvme, lanceolate, ^ as long as 

 the inner 9-veined one ; inner neutral pale nearly as long as the outer. — Dry 

 fields, etc., W. Y. to Ohio and S. Statep. Ja (P. dichiStomum /3. Gray.) 



19 P. latifolium L. Culm mostly erect, 1 to 2f high ; lvs. lanceolate, base dilated 

 and cordate-clasping, 3 to 5' by 1', 11 to 13-veined, smoothish; sheaths hirsute at 

 throat ; pan. exserted. compound, loose, about 3' long ; spikelets oval, obtuse, 



