4r)8 



I'OACK.K. 



Spikelets ^-fJ-tlowercil. in iiciirly sessile clustors, crowded into 

 an (iVdid or cylindrical s|)ikelil<L' panicle, racldlia articulate above 

 the lower i,diinie8, llower.s mostly perfect. l']nii»ty ;;liiiiies persistent, 

 jncnibranoiis. nearly equal and pointed; lloral i:lutne .'l-o-toollied 

 lit the apex, the central t(n)th extending,' into a point or short awn; 

 palea :.*d<oeIe(l. Stamens ;5. (J rain free from the palea. 



I'erennial tufted jj^rasses with Hat or convolute Icuf-hlades. 

 Huse of tlu^ lower spikelets usually subtended by a irhinielike bract. 

 A snndl ^j^enus of about S species, chiefly fouml in Hurope and 

 western Asia. Sc.slcrii/ is nearly allied to Ku'lcrlti and rmi. 



1. S. cKKiLiiA (L.) Arduin. Sp. -'iis. /. (;(1S();). IJi.ir: 

 Sesli;hi A. ('iiiioxiti'Ks rd'nilriis \i. sp. IM. ;•• (KT):]). 



IJootstoeks cree{)ing; culms erect, IT)— K)cin. hi^'li. Leaves of 

 sterile shoots densely tufted, blades rather stitT, abruptly pointed, 



apex seabrid, those of thi' cidm '^'-I), the up- 

 per about 1 em. \o\\\i. Panicle bluisli-<,'ray, 

 shiiung, I-Ij em. Ion;;. Sj)ikelets mostly 

 in pairs, one sessile, the other on a short 

 pedicel; emi)ty ^dumes thin, acute, faintly 

 nerved, about 5 mm. long; lloral glume oval, 

 ciliate, 3-toothed, 5 mm. lon.i;. S])aringly 



Fig OO. — Sesleria rip- introduced in ijrass-seeds from Europe. 

 ruled. S|)ikelet. (Uicli- . 



unison.) Found in Luroi)e and western Asia. 



105. (211). Abundo Journ. L. (Jen. Ed. 1: 19 (17:37). Bonax 

 Beauv. Agrost. 77 (18r2), in part. Siolnrldoo Mert. & Koch, 

 Koehl. Deutsehl. Fl. 1:528 (182:5). Aiiiphiduiiax Nees, Lindl. 

 Introd. Xat. Syst. Ed. 2, 449 (1830). Donacium Fries, liot. 

 Xotiser, 131 (184:)). 



Spikelets 2-G-ll()wered, borne on anam])le painele, racbilla silky- 

 bearded, articulate above the lower glumes and between the llorets, 

 which are perfect or tbe upper staminate. Emj)ty glumes narrow, 

 glabrous, slightly uneciual, lanceolate, keeled, 3-nerved ; lloral 

 glume membranous, slender, often more or le.-s divided with a ma- 

 cro between the lobes; palea hyaline, .shorter than its glume, puhes- 

 ceut on the keels. Stamens 3. Styles distinct. Grain oblong, 

 included, but not adherent. 



