PoA. CLXI. GRAMINE^. 615 



Ivs. lance-linear, short, smooth, carinate, on loose, glabrous sheaths ; slip, oblong, 

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

 spikelds 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, 3^4f high ; Ivs. lance-linear, striate, rough above, 



about a foot long, on striate, roughish sheaths ; stip. lacerate ; panicU large, 

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

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

 veined flowers. — %. A beautiful and valuable grass in wet meadows, N. Eng. to 

 Mich. June. 



10. P. ELONGATA. Tort. 



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

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

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

 containing about 3, obtuse, 5-veined flowers.— "II. 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 — i' 

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

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



12. P. coNPERTA. 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 ; spikekts 8-flowered, glabrous. — % Perm., Schweinitz 

 (fide Beck), S. to Car. 



13. P. MODESTA. Tuckerman. 



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

 by I", rather rigid; sheatlis 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 jl. larger, sessile," veinless ; caryopsis ovate, fuscous. — Brooksides, Cam- 

 bridge, Mass. E. T. *- 



14. P. Canadensis. Torr. (Briz^ Canadensis. Michx.) 



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

 on smooth sheaths ; stip. lacerate, ovate-obtuse ; panicle large, 6—8' 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, lo-icer 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; stip. short ; panicU 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. HiRstJTA. 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 ; palcce ciliate. — %. Sandy fields. July, Aug. 



(i. spectabdis. ( Torr. P. spectabilis. P.) Spikelets linear, 10— 15-flowered 

 St. taller. 



17. P. MARITIMA. Huds. 



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

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



