ORDER 155. GRAMINE^E. 



401 



8 E. teiiuis (Ell. Poa trichodes N.) Plant 1 3f high; pan. long (824), loose, 



capillary, bearded in the lower axils; spikelets 3(2-6)-fl\vd. (sometimes 7-9-flwd. 

 Gray) ; pales and glumes lanceolate, hyaline, 3-veined, 1$" long. ii 111., and S. 



9 E. capillaris (L.) Like E. tennis, but the spikelets are minute (1 if"), the fls. 



24, acute, scabrous, with only the midvein apparent. ii Sandy fields. Aug. 



10 E. nitida (Ell.) Plant 2 4f, glabrous and polished (except the bearded throat of 

 the long, rolled Ivs.) ; pan. If 3f long, narrow, branches some whorled; spkl. lance- 

 iinear, 34", 5-12-fl wd., on capillary divaricate pedicels ; gl. and pales acute, 

 3-veincd, often purplish, 1" long, u Marshes, 111. (J. Wo'f), and South. 



HE. pectinacea (Mx.) Gr. (E. hirsuta [Ell. etc.]). Culm 1 3f, rigid; shealha 

 some hairy; pan. very large, branches rigid, the lower deflexed in fruit; spkl. (,/) 

 oblong, purple, 2 3" ; fls. 5 15, oval, acutish, strongly 3-veined. it Sandy fields. 

 July, Aug. (Poa tpectabilis Ph.) A showy grass, sport of the winds when dry. 



45. POA, L. SPEAR G. MEADOW G. Spike- 

 lets 2-o(rarely -9)-flwd., compressed. Glumes sub- 

 equal, pointless, shorter than the contiguous fls. 

 Pales herbaceous, soft, awnless, the lower com- 

 pressed-carinate, 5-veined, usually clothed at base a 

 with a cobweb-like wool. Grain free. Smooth 

 grasses, with soft flat leaves, and panicled flowers. 



Branches of the panicle in 2's, 3's, or often single. . (*) 

 Branches of the panicle in about 5's, half-whorled..(**) 



* Fls. not webbed, merely pubescent on the back. . .(a) 



* Flowers webbed together at the base with gossamer-like wool.. .(/) 



a Annual or biennial. Panicle dense, spikelets subsessile No. 1 



a Perennial. Panicle loose, spikelets long-pedicelled Nos. 2, 3 



b Spikelets 2- or 3-flowered, on slender pedicels Nos. 47 



b Spikelets mostly 5-flowered, ovate, short-pedicelled Nos. 8, 9 



** Spikelets 2-4-flowered, loosely pedicelled. Panicle large Nog. 1012 



** Spikelets 3-5-llowered, subsessile, panicles rather dense Nos. 13, 14 



1 P. aiiiiua L. Low (3 8'), tender, spreading; culms flattened; Ivs. 2 4' by 1 2"; 

 pan. 2 3', dense ; spikelets ovate-oblong, nearly sessile, loosely 5-7-flwd., 22$"; fls. 

 lanceolate, acutish. (T) @ Fields and lawns, forming a soft, dense turf. Com. Eur. 



2 P. flexuosa Muhl. Culms erect, 1220'; Ivs. linear, 25'; pan. very thin and 



open : branches filiform, often flexuous, long (2-3'), bearing the spikelets near the 

 end ; fls. 36, lance-linear, 2J", 3-veined, remote. "21 Woods, Va., Ky., and S. 



3 P, liexaiitlia. Wood. Weakly erect, 1J 2f, leafy to the top ; branches of the thin 



panicle filiform, suberect, straight, 2 4' ; spkl. few, terminal, oblong, 3 4" ; Jls. six 

 (57), oblong. H", 5-veined, very obtuse, if. Meadows, Atlanta, Ga. 



4 P. forevifolla Muhl. Culm compressed, 1 2f, its Ivs. generally short (|-2'), ab- 



ruptly cuspidate, root Ivs. long, pointed ; pan. loose, branches filiform, spreading; 

 f-pikelet ovate, purplish ; fls. 3 or 4, 2i", lanceolate, 5-veined, webbed, u Pa. to 111. 



5 P. dcbilis Torr. (d) Culms terete, weak, 1J 2f; pan. loose, some spreading, 



branches capillary, in 2's and 3's ; spkl. (e) few, ovate ; fls. (/) 3(2 4), broadly oblong, 

 very obtuse, 1J", the glumes ovate, 1" ; lignle oblong, acute. 11 Woods, R. L, and \V. 



G P. diiiniitlia Wood, (a) Culm compressed, very slender, H 2f; Ivs. long, 1" 

 wide ; ligule short, truncate ; pan. slender, branches in 1's and 2's, suberect ; spkl. (b) 

 ovate; 11s. (c) 2(13), linear -oblong, acute, 1$" ; gl. ^ as long. if. Fields, Ala. May. 



J P. laxa. lloenke. Culms tufted, G 8'; Ivs. erect, 1 3', very narrow; pan. open, 

 12' long; spkl. few, 2J" long; glumes acuminate, as long as the (3) purplish fls. 

 IU'') ; lower pale villon* on the keel, u Mountains, N. 



26 



