706 Oedeb 156.— GRAMINE^E. 



mimerous spikeUis which are 1 to 11-flowered and only IJ" lonfr; pales hyaline, 

 ovate, pointed, 3-voined. — :D Car. to Ga. and La. (Poa oonferta Ell.) The 2 pales 

 feJl together. 



5 E. nitida. Culm erect, rjldbrotts and polished as well as the whole plant, 12 to 

 20'. Lvs. long, liuear, involute when drj-, with a few hairs at top of sheath; 

 pan. diffuse, much longer than the culai ; spikelets lanceolate, about 8-flowered, 

 hyaline gluuaes j,nd pales sharply serrulate on the keel. — ® S. Car. and adjacent 

 islands. Jn. — Aug. (Poa nitida Ell.) 



6 E. hirauta. Culm subsimple, compressed, erect, 1 — 2f; lvs. lance-linear, attenu- 

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

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

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

 long, 2 to 3 ", purplish, 5 to 16-flowered, long pedicelled; pale ovate, acute, dis- 

 tinctly 3-veined, upper ciliate.— If Sandy fields, U. S. Jl., Aug. The raohis 

 never (?) becomes pectinate. (Poa hirsuta Mx.) — Varies with the lvs. and sheaths 

 nearly smooth and ppikelets larger (P. spectabilia Ph.) Also with the whole pani- 

 cle, except the spikelets, hirsute like the axils. And thirdly, with the spikelets 

 racemously appressod along the branchlets (P. refracta EU.) 



7 E. Ptirshii Schrad. Culm decumbent at base, ascending 6 to 12 or 20' ; lvs. 

 subulate, 1 to 3' long, upper surface rough ; sheaths very hairy at throat ; pan. 

 long and loose, tho lower branches, or all, hairy in their axils ; ped. capillary, 

 longer than tho spikelets which are lance-obkmg; 5 to 12-flowered; pales merely 

 acute, purplish. — CD Dry fields, Md. to G-a., common. Jl., Aug. (P. tenella ? Ph. 

 Ell.) 



8 E. capill^ris Nees. Culm branched at base, smooth, 1 to 2f ; lvs. linear, at- 

 tenuated above, flat, smooth ; sheaths striate, with long hairs about the throat 

 and margin ; stip. short; pan. very large (near a foot long) with dilfusely spread- 

 ing, capillary branches, axils not bearded, or the lower slightly ; spikelets ovate, 

 acute, about S-flowered, on rather rigid, long, capillary pedicels ; 'pales scabrous, 

 J" long, acute, the 2 side veins scarcely visible. — Dry grounds, IT. S. Aug. 



9 E. trioliodes. Culm simple, 12 to 20', erect ; lvs. long (10 to 18"), rough, 

 thinly hairy, as well as the sheaths, throat with long hairs ; pan. rather longer than 

 culm, narrow, capillary, only the lower axils bearded ; spikelets not colored, 2 to 

 5 (mostly 3)-flowered ; pales and gls. hyaline, disti'octly d-veined, lanceolate, IJ" 

 long. — y Sandy soils, S. and "W. States. (P. trichodes Nutt P. tenuis Ell.) 



10 E. eiythrogoua Kees. Oulms ven-y brandling, in tufts, ascending 3 to 10' ; 

 joints a narrow red ring ; lvs. narrow, convolute when dry, the upper about equal- 

 ing the oblong, rather dense panicle ; spikelets 2 to 5 (mostly 3)-flowered, 1 to 1-J" 

 long, bluish ; gls. lanceolate ; pales ovate, all acute and nearly veinless. — CO "Waste 

 and cultivated grounds, Penn. (Jackson) to 111. and South. "Whole plant bluish. 



40. PO'A, L. Spear Grass. Meadow Grass. (Gr. Ttoa, grass.) 

 Spikelets 2 to 5 (rarely 9)-flowered, compressed ; glumes subequal, point- 

 less, shorter than the contiguous flowers ; pales herbaceous, soft-awnless, 

 the lower compressed-carinate, 6-veined, usually clothed on the veins 

 below with a cobweb-like, matted wool, the upper pale bicarinate ; stig- 

 mas simply plumous ; caryopsis free. — Smooth grasses with soft flat lvs,, 

 the fls. paniculate. 



IT Branches of the panicle In 2e, 8s, or often single. (*) 



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



a Annual. Panicle dense with sui)ses6ile spii^elots No. 1 



a Perennial. Panicle loose, spikelets long-pedicellate Nos. 2, 8 



• Flowers -webbed.— Spiltelets mostly 2-flowered, 2". Pan. very slender No. 4 



— Spilielots mostly 2-flowered,— many, panicle diffuse Nos. 5, 6 



— few (4 to 8). Mountains No. 7 



—Spikelets mostly 5-flowered, ovate, short-pedicelled Noe. 8, 9 



% Branches of the panicle in about 6s, half-whorled. (b) 



b Spikelets 2 to 4-flowered,^ohtu6e, jiedioeliate, loose No. 10 



—acute, pedicellate, very loose Nos. 11, 12 



b Spikelets 3 to 5-flowercd, subsessile in rather dense panicles Nos. 13, 14 



1 P. ^nnua L. Akuual Speak Grass. Culms decumbent and rootmg at the 



