Cl*2 CLXI. GRAMINEvE. Kceleru. 



about 8' long ; sheaths veined, smooth Avith obsolete stipules ; panicle branched, 

 spreading, somewhat 1-sided, branches subsolitary; spikelcts lance-linear, 7 — 9- 

 fluwered, about 8" long; loiver glume ai'm.Wti ; lower palea acumincLte. — 7]. Intro- 

 duced in fields and meadows. June, July. 



4. P. DURiuscuLA. Hard Fcscite Grass. 



St. smooth, 12 — 18' high ; Ivs. linear, very acute, a little scabrous ; stipules 

 membranaceous, lacerate ; panicle oblong, spreading, inclining to one side, 

 branches in pairs ; spikelets nearly terete, 5 — 7-fl.owered ; Imoer glume smaller, 

 upper one 3-veined ; palcce unequal, lower with short awns. — 1|. Fields and pas- 

 tui-es. A fine grass, common. Car. to Can. June, July. 



5. F. NUTANS. Willd. 



St. erect, slender, smooth, with black nodes, about 3f high ; Ivs. narrow- 

 linear, a foot long, veined; panicle slender, diffuse, at length nodding, branches 

 in pairs ; spikelets lance-ovate, 3 — 5-flowered ; fis. smooth, awnless and nearly 

 veinless. — 71. Open woodlands, in most of the States. June. 



6. F. FASCICULARI.S. Willd. 



St. much branched from the base, with short internodes, procumbent, 

 geniculate, 12 — 18' long; Ics. linear, very long, 5-veined, scabrous, on long, 

 loose sheaths; panicle erect, inclining to one side, with strict, spike-form 

 branches; spikelets appressed, secund, 8 — lO-fiowered; glumes 1-veined, lower 

 one very short ; loioer palece tipped with awns of their own length. — (J) Wet 

 meadows, Mid. States. Aug. 



7. F. ovlNA. Slieep's Fescue. 



St. erect, ascending at base, 6 — 10' high; Ivs. very narrow, rough, radical 

 ones very numerous, 2 — 4' long, cauline few, short, erect ; panicle few-flowered, 

 simple, contracted ; spikelets ovate, 4-flowered ; palece roundish. — % 1 A valu- 

 able grass, recently introduced. June. 



8. F. MYtJRUs. 



St. 6 — 12' long, erect, geniculate near the base ; Ivs. 2 — 3' long, subulate, 

 concave ; slip, bifid or refuse ; panicle slender, crowded ; spikelets 4 — 7-fiowered ; 

 ^Zw??ics minute, equal ; _;?5. subulate, hairy; lower palece with, an awn twice its 

 length; sta. 1; stig. plumose, white. — Sandy fields, N. J. to Car. 



37. DIARRHENA. Palis. 

 Gr. Sis, two, apprjvrii, rough ; from the two scabrous keels of the upper palese. 



Panicle racemose or simple ; glumes 2, very unequal, 2 — 5-flow' 

 ered, rigid, acuminate, mucronate ; palea3 cartilaginous, lower cuspi- 

 date, upper much smaller, emarginate ; caryopsis coated, as long as 

 the upper palea : scales ovate, ciliate. 



D. DiANDRA. Wood. (D. Americana. Pali.';. Festuca diandra. Mr.) 

 St. erect, nearly leafless, slender, rigid, 15 — 30' high; lis. few, subradical 

 broadly linear, flat, rough-edged, 10 — 16' by 5 — 7", nearly glabrous ; sheathf 

 close ; stip. obsolete ; panicle very simple and slender, branches ei'ect, few ; spike- 

 lets 2-i\oweTed; gliwies hroad-ovate, upper twice larger, 5-veined; pale cs much 

 longer than the glumes, the upper with 2 roughish, green keels, and conspicu- 

 ously mucronate; sta. 21 — River banks, Ohio to 111. ! 



38. KCELERIA. Pers. 



In honor of M. Kreler, a German botanist. 



Spikelets compressed, 2 — 3-flowered; glumes 2, unequal, shorter 

 than the flowers ; upper flower pedicellate, with a short, awn-like rudi- 

 ment at the base of the upper palea ; palese 2, the lower awnless, oi 

 awned beneath the tip. 



1. K. CRisTATA. Smith. (K. nitida. Null. K. tuberosa. Pars.?) 



St. 20 — 30' high, smooth, leafy to one-half its height, rigidly erect; Ivs. 



flat, erect, pubescent,- 2 — 3' by 1 — 2", shorter than their pubescent sheaths ; stip. 



short, lacerate ; panicle spicate, narrow, 3 — 5' long, 6 — 8" diam., branches very 



short ; spikelcts 2" long, silvery and shining, compressed, about 2-flowered, with 



