ORDER 155. GRAMINE^E. 



393 



ft. nit i dnm. Smooth, shining; Ivs. narrow; ped. long; ppkl. oval. 



y. sphcerocdrpum. Hairy; peduncle long ; spkl. rounded, dark-purple. 



4. barbtilatum. Taller ; nodes with a ring of deflexed hairs. 



. lanug-inbtwni. Woolly; Ivs. larger; spikelets green; pan. larger. 



. tpathaceum. Hairy and leafy to the top ; panicles sessile. 



16 P depauperatum Muhl. Culm simple, strict, tufted, 6 12'; Ivs. linear, 

 erect, the upper elongated ; pan. simple, sessile or becoming long-stalked ; spkl, 

 ova l ? j_ i" ; lower gl. i as long as the upper 7-veined one. Hills and woods, com- 

 mon. June. Varies with Ivs. hairy or smoothish, and 



/3. involiitnnt) with Ivs. involute, ending iu a long stiff point. 



1 7 P. pauciflorum Ell. (c) Culm assurgent, 1 2f; Ivs. lanceolate, 35' by 57" 

 hirsute below as well as the sheaths, faintly 9-veined; pan. open ; spkl. (d, e) few, 

 large (1 H"), oval ; lower gl. i as long as the upper, (x, neutral fl.) Damp shades. 

 1 8 P. pubescens Lam. Culm slender, branched, 2 3t'; Ivs. lance-linear, 36' by 

 3_5", 9-veined, retrorsely hirsute as well as the open sheaths ; spkl. oval, W, pubes. 

 cent, outer glume lanceolate, 1", inner 9-veined. Dry fields. June. 



19 P. latiiolium L. Erect, 1 2f; Ivs. lanceolate, dilated and cordate-clasping at 

 base, 35' by 1', smoothish, 11-13-veined ; pan. exserted, 3' long ; spkl. obovate, 

 H" ; lower gl. ovate, i", upper gl. 9-veined ; neutral pales sub-equal, usually with 3 

 stamens. In moist shady places : common. June, July. 



20 P. xantliophysum Gr. Culm simple or branched below, 915' ; Ivs. lance- 

 olate, 36' by 57", not dilated at the ciliate clasping base ; pan. long-stalked, 

 raceme-like; spkl. few, round-obovate, H"; -lower gl. ovate, } as long as the upper 

 9-nerved one; sterile fl. often $. Dry. N. Eng. to Wis. June. 



21 P. -viscldum Ell. Hoary with a dense vicid pubescence, 2 4f, stout; joints 

 Avith a smooth brown ring; Ivs. lance-linear, 36' by 616" ; pan. 46', loose; spkl 

 pale, oval, 1" ; lower gl. and upper pale minute. Wet. N. J., and S. Aug. 



22 P. clandestinum L. Culm rigid, leafy, 2 3f ; Ivs. 30' by 1', dilated and cor- 

 date at base ; sheaths scabrous or rough-hairy, enclosing the lateral and often the 

 terminal dense panicle ; spkl. elliptical, 1J". Moist woods. July, Aug. 



23 P. microcarpon Muhl. Erect, simple, glabrous; Ivs. lanceolate, broad and 

 clasping at base, veiny, 610" wide ; pan. long-stalked, diffuse ; spkl. small (J), oval, 

 numerous, purple ; lower gl. minute. Pa., W., and S. July Sept. 



24 P. MILIACEUM. Millet. Lvs. lance-linear and sheaths hairy; pan. large, open, nod- 

 ding ; spkl. ovate, solitary ; glumes pointed, sub-equal. Turkey. 



21. FENICILLARIA SPICATA. Erect, 4f, branching, with broad, 

 flat leaves. Panicle cylindric-oblong, If in length, compact, consisting of innumerable 

 simple branches, each with 2 or 1 spikelets at the end, and clothed with spreading hairs 

 Each epikelet bears at length a white ripened grain. E. India. 



22. OPLISMENUS, Beauv. COCK-SPUR G. 

 Spikelets in dense, spike-like, panicled racemes. 

 Glumes and lower pale of the sterile fl. rough- 

 pointed or awned. Otherwise as in Panicum. 



1 O. crus-galli L. (a) Culm terete, 3 4f ; Ivs. lance- 

 linear, rough-edged, ligule none; pan. with its spike- 

 form branches alternate or in pairs ; rachis rough-hairy ; 

 glumes bristly, scarcely awned; awn of the pale (6) 

 618" long, very rough. Sheaths generally smooth. 

 Waste grounds : com. Aug., Sept. [ me rely pointed. 

 /5. mutlcn*. (c) Awns very short, or the hispid pale 

 y. htpidvn. Sheaths very -bristly; awns very long. A very coarse variety. 



