AVKNK.K. 



3D1 



Rorkv ^[oiiiitaiiiK, Wiisliiiifyion. ('alifnrniii. 



\ III', uniipicata (Miinnt). It. imiApiniltt Munro, Viwcy, Cut. 

 fJr. :.!» (lH.s:>). 



Ciiliiirt lO-'^O ctn. Iiigli, <l('iMel,v tufted. Lciivos nilky liuirv, tlio 

 hiiii's on till' Hlicatlis cuiiiiiig fruin while itiipillic. Spikclcts iistiiillv 

 Bulitury aiitl teriiiiiial. 



I)r. 'riiurlMir in Hot. Calif, say thin occurs with tho apotiL'.s 

 suinrtiiiies coniiii;^' from tho uaiiio tiift.s. 



( 'all fori) iu, Tivnuhf r>'.M»; lloirrll, Liniiiion 4(57, J'ari.sh 1785, N. 

 Trans. Coiil. Siirv. Cnii/n/ d' Snuhiwr lUT. 



:{. D. Mexicana Scrihii. Proc IMiihi. Acad. 301 (IS!»1). 



Culms (](>-!»() cm. high, crc(!t, firm, Hcahorulous. liigule acute, 

 3 mm. long; hladcs of stcrih; shoots numerous, lirm, urcct, .scsahcr- 

 iilous, convolute, tJO-IJO cm. long, tho.se of the culm 13, the upper 

 lO-l'i cm. long. I*ani(!le spikclike, .«trict. l.'j-'^'^ cm. long, the 

 lowest rays rather nimote, l>earing l-;i spikelets. Spikelets .'{-4- 

 llowered. pur})lc, ahoiit IT) mm. long; empty ghunes elliptical- 

 lanceolate, H D-norved, first 9 mm. long, second a little longer; 

 floral glumo 7-9-nerved, silky hairy below, .') mm. long to base of 

 tooth, which are 5 mm. long, awn 1-1.4 cm. long; pulca extending 

 to the middle of the teeth of its glumo. 

 Ovary W mm. long, with a pube8(!ent 

 cu.shion-like summit. 



Mexico, PriiKjle 3270, limestone 

 ledges in September. 



4. D. gpicata W. & S. Syst. 2: 690 

 (1817). A. (jh(i)iosa Heauv. Agrost. 93 

 (1812). 



(^dms tufted, 30-GO cm, high. 

 Leaf-blades short, narrow, involute, the 

 lower ones curly, sparingly silky hairy. p,„ m-Dt,nthoni,i spknfa. 



Simple panicle or raceme 2-0 cm. long. -'•, spikclei; c, gmin mui 



' ' paioti. (bcnbner.) 



Spikelets 4-7-flowered, empty glume.s 



3-nerved (or Avith 4-5 obscure nerves), first 10-12 cm. long, second 



a little shorter; lloral glume about 3 mm. long to the teeth, which 



are half as long or longer, lower floral glume 7-uerved, awn flat, 



