POA. CLXI. GRAMINE^E. G15 



ITS. lance-linear, short, smooth, carinate, on loose, glabrous sheaths ; stip. oblong, 

 dentate ; panicle spreading, the branches generally solitary, at length horizontal ; 

 spikelets ovate-oblong, rather numerous, containing about 5, loose flowers. A 

 small, abundant, annual grass, N. Eng. to Ohio, forming a dense, soft and 

 beautiful turf. May Sept. 



9. P. NERVATA. Willd. (P. striata. Michx. Briza Canadensis. Nutt.) Foul 

 Meadow. St. smooth, 3 If high ; hs. lance-linear, striate, rough above, 



about afoot long, on striate, rough ish sheaths; stip. lacerate; panicle large, 

 loose, diffuse, equal, branches weak, pendulous in fruit, long and capillary, in 

 2s or 3s ; spikelels ovate-oblong, containing about 5, obtuse, conspicuously 7- 

 veined flowers. 1\. A beautiful and valuable grass in wet meadows, N. Eng. to 

 Mich. June. 



10. P. ELONGATA. ToiT. 



St. round, erect, smooth, 3f high ; Ivs. narrow-linear, smooth, 8 15' long ; 

 sheaths striate, smooth ; stip. very short ; panicle (8 10') elongated, racemose, 

 nodding, branches solitary or in 2s, appressed ; spikelets ovate-obtuse, tumid, 

 containing about 3, obtuse. 5-veined flowers. 1L Wet meadows N. Eng. to 

 111. July. 



11. P. OBTUSA. Muhl. 



St. smooth, firm, 2 3f high ; Ivs. dark green, linear, often surpassing the 

 stem, and with the sheaths smooth ; panicle dense, ovate, many-flowered, 3 4' 

 long; spikelets ovate, tumid, thick, containing 5 7, smooth, ovate, obtuse flow- 

 ers ; lower palea 7 veined. Tj. Swamps, N. Eng. toPenn. Aug., Sept. 



12. P. CONFERTA. Ell. (P. glomerata. Walt.) 



St. erect, geniculate, 2 3f high ; Ivs. glabrous, flat, serrulate on the mar- 

 gin ; panicles terminal and axillary, 4 8' long, erect, compressed, with the 

 spikelets densely clustered ; spikelets 8-flowered, glabrous. 1J. Penn., Schweinttz 

 (fide Beck), S. to Car. 



13. P. MODESTA. Tuckerman. 



St. short, geniculate at base, branched, compressed, glabrous ; Ivs. 3 4' 

 b,y ", rather rigid ; sheaths striate, smoothish ; stip. conspicuous, truncate, erose 

 and laciniate ; panicle strict, 6 9' long, branches solitary, filiform, scabrous ; 

 spikelets scattered, briefly pedicellate ; glumes unequal, obtuse, erose, glabrous ; 

 lower fl. larger, sessile, veinless ; caryopsis ovate, fuscous. Brooksides, Cam- 

 bridge, Mass. E. T. 



14. P. CANADENSIS. Torr. (Briza Canadensis. Michx.) 



St. round, smooth, erect, 3 4f high; Ivs. broad-linear, rough, glaucous, 

 on smooth sheaths ; stip. lacerate, ovate-obtuse ; panicle large, 68' long, 

 branches flexuous, in half- whorls, much spreading or pendulous in fruit ; spike- 

 lets short, ovate, tumid, 6 8-flowered ; glumes much shorter than the lower 

 flower ; upper palea very obtuse, lower about 7- veined ; sta. 2. 7J. A large and 

 beautiful grass, in shady grounds, Free States, Can. July, Aug. 



15. P. CAPILLARIS. 



St. much branched at base, smooth, a foot high ; Ivs. linear, attenuated 

 above, flat, smooth; sheaths striate, with long hairs about the throat and mar- 

 gin ; stip. short ; panicle very large (near a foot long), with diffusely spreading, 

 capillary branches, axils smooth ; spikelets ovate, acute, about 3-flowered, on 

 long pedicels ; palea scabrous. Dry grounds, U. S. Aug. 



16. P. HIRSUTA. Michx. 



St. subsimple, compressed, erect, 1 2f high ; Ivs. lance-linear, attenuate 

 at end, surpassing the stem, hairy at base ; sheaths loose, longer than the inter- 

 nodes, lower ones hairy, upper ones smooth ; stip. fringed ; panicle very large, 

 capillary, branches spreading, reflexed in fruit, hirsute in the axils ; spikelets 

 oblong, about 5-flowered ; palea ciliate. Tj. Sandy fields, July, Aug. 



/?. spectabilis. (Torr. P. spectabilis. P.) Spikelets linear, 10 15-flowered 

 tf. taller. 



17. P. MARIT1MA. Huds. 



St. somewhat geniculate, round, about a foot high ; Ivs. somewhat glau- 

 cous, rough-edged, involute ; panicle erect, dense, branches in pairs, scabrous : 

 52* 



