PoA. CLXI. GRAMINEiE. 615 



Ivs. lance-linear, short, smooth, carinate, on loose, glabrous sheaths ; s^i;?. oblong, 

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

 spikekts 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. 3Jichx. Briza Canadensis. Nutt.) Foul 

 Meadow.— St. smooth, 3 — 4f high ; lis. lance-linear, striate, rough above, 



about a foot long, on striate, roughish sheaths; slip, 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.— Ij. A beautiful and valuable grass in wet meadows, N. Eng. to 

 Mich. June. 



10. P. ELOXGATA. TorT. 



St. round, erect, .smooth, 3f high; Ivs. narrow-linear, smooth, &— lo long; 

 sheaths striate, smooth ; slip, very short ; panicle (8—10') elongated, racemose, 

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

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

 111. July. 



11. P. oBTirsA. Muhl. 



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

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

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

 ers ; lower palea 7 veined.— 1[. Swamps, N. Eng. to Penn. Aug., Sept. 



12. P. coNFERTA. Ell. (P. glomcrata. Walt.) 



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

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

 spikelels densely clustered ; spikekts 8-flowered, glabrous.— Tj. Penn., Schweimlz 

 (fide Beck), S, to Car. 



13. P. MODESTA. Tuckerman. 



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

 by J", rather rigid; sheaths striate, smoothish; slip, conspicuous, truncate, erose 

 and ikcinisite ; panide strict, 6— 9' long, branches solitar}-, filiform, scabrous; 

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

 Urwer Jl. 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 ; lis. broad-linear, rough, glaucous, 

 on smooth sheaths; slip, lacerate, ovate-obtuse; panick large, G— 8' long, 

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

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

 flower ; vjrper palea very obtuse, Imoer about 7- veined ; sta. 2. — %. 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; slip, short; panick very large (near a foot long), with diffusely spreading, 

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

 long pedicels ; palecc scabrous.—® Dry grounds, U. S. Aug. 



IG. P. iiiRsuTA. Michx. 



,SY. subsimple, compressed, erect, 1— 2f high ; lis. lance-linear, attenuate 

 at end, sui7)assing the stem, hairy at base ; sheaths loose, longer than the inter- 

 nod<'s,' lower ones hairv, upper ones smooth; .s//>. fringed; /w/nV/<: very large, 

 capillary, branehes spreading, reflexed in fruit, hirsute in the axils; spikekts 

 oblong, about 5-flowered; paka: ciliate.— '2^ Sandy fields. Julv, Aug. 



p. .spcctabULs. {Tbrr. P. spectabills. P.) SpUcckls UneSir, 10— lb-&ovrered 

 St. taller. 



17. P. MARITIMA. Huds. 



St. somewhat f^f'niculate, round, about a fool high; Ivs. somewhat glau- 

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



