4/)0 



I'OACK.K. 



}j;liiiiies persistent, liiiiceoliite. liyaliiie. I-iierved; lloral fjlunio 

 larjrer, IJ-iierved. lirni, entire, retnst' or :>-|ioiiite(l. tlie central nerve 

 Uirniiniitin;^' us ii niiicio; palea liyaline. •.'-Iceeled. (•oni])Iicate. 

 Staiiions ;J. Styles el<»n<;ate(l, olollieil with short hairs, (irain 

 ovjite or oblonu;, enclosed, l»til not adherent. Low annnal <:;rassi's, 

 witli many stilT c'reepin<f stems, the leaves pointed, firm, mostly on 

 very short l)ranelies. Spikelets snhsessile and almost concealed 

 by tlio leaves. 



tS])ecies ;{ or 4, one of which l)elon<rs to Texas and Mexico, and 

 northward to Alberta; the others further south. 



1. 311 squarrosa (Nutt.) Torr. I. c. Cri/jisi.s siiiawrnsn Xutt. 



Gen. 1 :4!» (IHIS). 



Culms lirm. stoloniferous, o-.')!) cm. 



hi 



jrii. 



Sheaths 



.> mm. \u\\'s: li<nile a 



Fio. 88. — Munrod squarrom. 

 Spiliclel. (Scribuer. ) 



mi're I'ing; blades Hat oi- conduplicate, 

 l-I) cm. loji;i. Second alume and 

 lloral ,i,dume .') mtn. long. 



Colorado, Wan/ for U. S. Dept. 

 Agricul. niCt. also Cdssii/i/. 



The genus is a ])erfeotly isolated 

 one, showing only some sliglit ailinity 

 with Mondnlhochhiv, esi)e('ially in hav- 

 ing the very few spikelets sessile witliin 

 a cluster of lloral leaves. The flowers 

 are not unisexual. 

 Var. floccuosa Vasey ined. Plants o-o cm. higli; leaf-l)la(U^s 

 10-11} mm. long; second glume 3 mm. long; lloral glume 4 mm. 

 long. 



Arizona. Jours. 



10;i. (214a). OrcuTTIA Vasey, Hull.Torr. Club, i:}: -n'.i (l.^^SC.) 

 Spikelets 5-10-tlowered. sessile, compressed in a sinii)le dense 

 panicle. 1-5 cm. long, rachilla articulate above tlie empty glumes. 

 Empty glumes sparsely ])ubescent, green, thickish, broad, mostly 

 3-lobed. each lobe li-ncrved. .')-4 mm. long, margins scarious, un- 

 awnod : floral glume a little longer, many-nerved, round on the 

 hack, 5-lobed, otherwise like the empty glumes; palea as long as its 



