GRAMINKjE. 



447 



10. P. Canape'nsis. Briza Canadensis. Mx. 

 Sum round, smooth, erect, 3—4 feet high ; havs broad-lineiir, rough, 



p-laucous. on smooth sheaths ; s;//?m/c lacerate, ovate-oblusc ; i/a,ii<U large, 



(i S in(;hes long, branches fle.xuous, in half-whorls, ninch spreading or 



pendulous infniir-, 5/n7;fl'«5 short, ovale, tumid, (i—S-fl:)wered ;_g unus mucll 

 shorter than the lower flowers ; upper palca very obtuse, /«//:«/ about 7-neiv- 

 ed; slaincna 2. A large and beautiful grass, in shady grounds. Jl. Aug. 



11. P. capii.la'ris. 



Ulrm uiOch blanched at base, smooth, a foot high : hnrcs linear, attenuated 

 above, fl it. smooth ; i-lteiilis striate, with long hairs about the throat and mar- 

 gin ; stipule short; pnn/cle very large (near a foot long), with diffusely 

 spreading, capillary branches, axils smooth; spkdrts ovate, acute, about 

 3-flowered, on long pedicels : /w/fi(£ scabrous. Dry grounds. Aug. Ann. 



12. P. hirsu'ta. Mx. 



Sum subsimple, compressed, erer.t, 1 — 2 feet high; harrs lance-linear, 

 attenuate at end, surpassing the siem, iiaiiy at base ; ulietit/m loose, longer than 

 the internodes, lower ones hairy, upper ones smooth ; stipule fringed ; paiiide 

 very large, ca|)illary, branches spreading, refiexed in fruit, hirsute in the a.xils ; 

 f^s/i-e/^^s^oblong, about 5-flo\vered ; 7;.7/(«; ciliale Sandy fields. Jl. Aug. 



/3. spccabiUs (Terr. P. spectabilis. P.) ; sy;;l-<./tti linear, lU—lfj-flowered ; 

 stem taller. 



13. P. mari'tima. 



Strm somewhat geniculate, round, about a foot high ; hnrrs somewhat 

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

 scabrous ; ypikelcts terete, linear, purplish, about r)-flovvercd ; Jluwirs obtuse, 

 indislinctlv o-nerved. Salt marshes. Ms. Dw. Jn. 



14. p. a^ua'tica. Torr. 



Smooth ; stent, stout, leafy, 4 — 5 feet high ; Irnrrs broad-linear, flat, thin ; 

 panidr erect, diffuse, branches at length spreading, flexuous. 3 — o together, in 

 half whorls; spikdets Imear, paiple, with G — b ovate-obtuse flower.s. Wet 

 meadows. Aug. 



15. P. DKNTA'TA. ToTT. 



Smooth; sftm erect, round, 3 feel high ; /e/zcz-s flat, linear, 10— Ifi inches 

 lono-, glaucous beneath; stipule elongated ; panicle large, loose, lew-flowered, 

 braiiches capillary, spreading ; spikdels lanceolate, about 5-flo\vered ; loner 

 glume 3-nerved ; lonier palea 5-nerved, 5 toothed at the apex when old. 

 Swamps. June. July. 



IG. P. fasciccla'ta. Torr. 



Very smooth ; stem firm and leafy, oblique, round, branclied at base, 1 — 2 

 feet hicrh ; /trttjcs flat, lance-linear ; panic f. spreading. //;■(/ /i/V/f.'* fasciculate, 

 crowded, straight; spikelels oblong, somewhat racemed, sessile, crowded, 

 about 3-flowered ; w-Zur/iCA- minute, unequal. Salt marshes. i\. Y. 



17. P. pf.ctin-a'cea. Mx. P. pilosa. Mnfi. 

 Stfin ttffispitose, oblique, geniculate at base, 8—12 inches high ; Irares flat, 



smooth, pilose at base, 5-nerved. 2 — 4 inches long; sheaths bearded at the 

 throat; /77n<c/e larsre, loose, capillary, purplish, hairy in the axil,'^, branches 

 subverlicillate ; spikelflsVineai, with .5— -1) acute flowers ; upper palea persis- 

 tent on the rachis which thus is made finally to appear pectinate. In sandy 

 fields. July. Aug. 



18. P. ukptans. 



Dioecious; 5<cm branched, creeping, rooting nt the joints, C — 12 inches long; 

 ieorrs subulate, flat ; i-Zc^^/zs open, pilose on the margin and throat; povicle 

 1 — 2 inches long, branches short, simple, in fascicles, few-flowered : spikdets 

 linear-lanceolate, with 19 — 80 acuminate flowers. Swamps. Jl. Aug, 



