484 I'oACK.K. 



or ac'uto, obscnroly S-iicrvcd, eiisily sidittiiig. about 2.5 mm. long; 

 p-aU'ii slif^litly iiuMrved. Hpaluluto or luirrowly obovate whcMi not 

 .-pri'iul oijcii, tninculL', tToso or slightly 3-lobt'd, nerves very ob- 

 scure, aiMooth. 2-'-'. 5 turn. loii^'. Gniiii not seeii. 

 MoxH.'O (^f'liihualiuii). J'ritit/Ir 115. 



14. E. sessilispicata lluukl. I'roc. Aaul. Pliila. OT (1862). 

 DIphu'hiif n't/i(/ir linntii. N'asi'y, (Jrassos V. S. 135 (1855). Erayros' 

 tiHriyiih Scrihn. I'loc Acad. Phila. ;}04 (ISOl). 



Culms erect, slemlor. 30-50 cm. lu;.di. IMadcs of sterile shoots 

 i=!cal)riil. involute or Hal, :5-l."> t-in. lonir. ".' uitii. uiilf. those of the 

 culm I-".'; liuMih; a mere riiij,' lirariiig thin hairs. I'aiiifle much 

 exserteil. simple, open, pyramidal, 12-".'0 cm. lon.ir; rayjisiuLde, the 

 loii^'cst (5-8 cm. lonj;. bearin,:jf about six apprcsscd spilsdcts. Spike- 

 lets sessile, G-'.i-llowcred. G-12 mm. lonj.': empty ^dumcs hmctolate, 

 .sube(pial. 4-5 nun. loiitr: first l-iuTved, second 3-nerved; floral 

 glume llrm, lan<H'olatc. IJ-mM-vod, -4 mm. long: paleii firm, incurved 

 or tumid at basf. :! nun. long. 



Texas, Ihwrri'liiin for V. S. Dept. Agricul. 5,"»(i, Curlisx o\b'd\ 

 Kew Mexico, 1 1 /-///A/ ;t:o. 



15. E. plumbea Scribn. ined. 



A tufted erect i-ather slender perennial, 40-00 cm. high. 

 .Sheaths smooth; ligule beardeil; blades llat or involute-rigid, 

 smooth lielow. scabrid abovt'. S-1",' em. long, 3-5 mm. wide. I'an- 

 icle simi)le, ovate or ])yramidal, 8-12 cm. long, rays single, bearded 

 in the axils, bearing a few .short branches. Spikelets mostly ]>e- 

 dieellate, lead-colored, llattened, ovate-lanceolate or linear. 10-18- 

 flowered, li-lO mm. long: em.pty glumes ovate-lanceolate, 1-nerved, 

 scabrid on the k(>el, first 2 mm. long, second ;> mm. long; floral 

 glume ovate-lanceolate, scabrid on the keel, lateral nerves less promi- 

 nent, 2.5-3 mm. long; palea .slightly incurved, linear before spread- 

 ing, acute, keels scaberulous. Grain very slightly compressed, 

 ovoid, 1 mm, long. 



^[exico (Guadalajara), Palmer '^■iO, Pri)ifilc 2311. 



16. E. Brownei (Kunth) Nees, Steud. Xoni. Ed. 2. 1:562 

 (1841). Poa i)ohjmorpha W. Br. Prod. 1:180 (1810). Mega- 



