H62 poACK.lv 



A. raniflu loo.st'ly sprcudiii^^s almost triclioloiiious. ... 1 

 \^. I'iiuicle narrow uiid delist', spikcliko 'i 



1. A. CAHYoiMivi.LK.N L. Sp. I'l. (Ki (IT."):;). .1. nijiilhiris 

 Salzni. Stcud. Noni. Ed. '.I, 1: 44 (1S4(I-41). 'riiciv arc at least 

 17 other syiioiiyiMS. 



A .^lelidi'f and eK'jfaiit tiil'ted aiiiiual. l()-"*() nn. Iii,i;li. Liiiidi- 

 2-4 mm. long; blades l-'.> em. loiiir, sdl't, narrow, soon in volute 

 ami twisted. I'anieU' l(j<»se and sprt'adinjj:. I'ays in pairs or threes. 

 .Si)ikelets orect, silvur-shinin^^; empty glumes about •^'.;i mm. lon<,% 

 ovate, aeute, sub-searious, 1-nerved: lloral jj;liime shorter, 'I mm. 

 long, dorsal awn projecting over I mm. above. 



(Jenerally distributeil over the aresi of the genus. Introduced 

 and naturalized in various portions of the United States from Del- 

 aware to California. 



2. A. PH.KCOX L. Sp. PI. G5 (1T53). A. pii,sil/a Sehur, Enum. 

 PL Transs. ;r)4 (IHCf.). 



A slender annual, 4-l"i cm. or rarely more in height. Ligulo 

 ahout "l mm. long; hlades 5 in number, 0.5-'^ om. long, soft, 

 narrow. .«» 'ii involute and twisted. Panicle contracted, 1-2 cm. 

 long. Spikelets erect, seldom over 10-20 in numljer; empty glumes 

 scarious, shining, ovate, acute, 2.5 nun. long, 1-nerved; iloral 

 glume 2 mm. long. 



A west l']uro]iean and Mediterranean grass, introduced into 

 Delaware, Peiinsylvaniii. and elsewhere. 



75. (15:?). WeingaERTNERIA r.ernh. Syst. Verz. Erf. 2:?: 51 

 (1800). Name used earlier. Cortpicphdrus IJeauv. Agrost. 00, /. 

 18, f. J (1812). 



Spikelets 2-ilowered. in a loose ]ianicle, rachilla articulate helow 

 the floral glumes and produced beyond them. Glumes thinly 

 s(!arious, 2 empty ones suhecpnd, acute, awnless; floral glume 

 shorter, hyaline, entire, with a tine awn dorsidly attached below the 

 middle, articulate near the middle, where there is a tuft of short 

 hairs, lower part firm and twisted, the upper part more slender with 

 a clavate apex; palea shorter than its glume, narrow, 2- toothed. 

 Stamens 3. Styles short, distinct. (J rain included, more or less 

 adherent to the glume and i)alea. 



