786 Oedee 156.— GRAMINBA 



If; Ivs. subulate, scabrous, 2 to 4' long; sheaths glabrous, longer than the joirrts; 

 pan. very simple, the few, solitary, smaU spikelets 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 EIL Villous throughout 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; spikelets oval, 1" long, green ; lower glume 

 roundish, -J- as long as the 'Z-veined, upper one, which equals the single, sterile 

 pale and lertile flower. — Evergreen in damp places, S. States (Feay, &o.). Apr., 

 May. 



14 P. ciliatiflonim. Fringed Grass. Culm erect, strict, 1 to 31] glabrous; 

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

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

 abortive pale obtuse, subequal, the 6 veins cihate-fringed with silky, purplish 

 hairs; upper pale much smaller, oblong; fertile pales thinly chartaceous, 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. Aulaxantlius ciliatus and rufa Ell. P. 

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



15 P. diohotomum L. Culm at first subsimple with u, single 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 in 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. — y Common everywhere, in meadows, fields 

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

 ceedingly variable species (which includes P. nodiflorum, laxiflorum, nitidum 

 Lam., barbulatum Mx., sphcerocarpa MuhL, lanuginosum, ensiforum Ell., &c.). 



/9. KiTiDUsi. Smooth and shining; spikelets pale purple; upper pale very 



short. 

 y. SPiiJ5R0cARPua. Hairy; Ivs. suberect jj^spikelets dark purple ; upper pale 



deeply hilid. " 



<i. BAiiBnLATUjr. Taller; nodes with a ring of retrorse hairs; Ivs. sproadiag; 



spikelets purplish ; upper pale entire. 

 £. LANUGINOSUM. "Woolly; Ivs. linear-lanceolate ; spikelets green ; upper pala 



elongated, very obtuse. Approaches the next species. 



16 P. depauperatum Muhl. Culm casspitous, erect, 9 to 12' high, simple above 

 the Ijaso ; Ivs. linear, rigidly erect, lower short, upper about 5' by 2-,}" ; pan. 

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

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

 inner, T-voined ono ; upper neutral palo (always?) bifld, half as long as the lower. 

 — IIDly woods, jSf. States and Can, Jn. (P. rectum R. & S.) 



p. i.\"TOLUTu:i. Lvs. involute, ending in a long, rigid point. (P. involutum, 

 Torr.) , 



X7 P. pauoiflorLim EU. Culm mostly erect, at length, somewhat decumbent 

 and branclicd ; lvs. erect, linear-lanceolate, faintly 9-veiued, tapering to near the 

 base; 3 to 5' by C 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 troad-ovate, ^ as long as the upper one ; upper neutral pale 

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



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

 lvs. lance-hnear, 9-veined, 3 to G' by 3 to 5", clothed with reflexed hairs as well 

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

 large (1 J ' long), hairy, oval, obtuse, green ; outer glume, lanceolate, -J as long as 

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

 fields, etc., N. T. to Ohio and S. States. Jn. (P. dichotomum j3. Gray.) 



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

 a/nd cordate-clasping, 3 to B' by 1', 11 to 13-reined, smoothish; sheaths hirsute at 

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



