FPxrrcK.E. 



4(57 



12-llo\vere(l, O-ll nun. loii<:, more or le.-^s tiii^'cd vitli red: ciiipty 

 glumes tliiii, I-iutvciI. second ovale, olitusi; or shortly miicroiuitc, 

 glaltroiis. 4 mm. loii;,'^: lloriil glunii- oval, 1 mm. loii^r. villous to- 

 ward the base niton the ;J <;reeii ni-rves. the midillc nerve shortly ex- 

 eurrent between the short teetii; palea l)road. the keels revoliite 

 below. 



Texas, Rirenlion; New Mexico. IIW///// 770. TTT, *^045; Mex- 

 ico, P via file I!»rO. Pahnn- \Vu\. 



Louisiaiui, New Mexico, western Texas, and Arizona. 



8. S. seslerioides (Mielix.) 

 Scribn. Mem.Torr. ("lub. ks(lS!)4). 

 Poa seslerioides Mielix. Fl. lior. 

 Am. 1:<;8 (180:5). /W i/in'm/Ke- 

 fitht I'ursli. Kl. Am. Sept. 1 : 81 

 (1814). Trioiliaruprea A. F. .laeq. 

 Eclog. (iram. 2:",»1, /. /'; (1814). 

 Tricuspis seslerioides 'J'orr. Fl. U. 

 S. 1:118 (18',>4). Sie(/liti;/iu Jlara 

 Kuntze, liev. Gen. IM. :8!» (1891). 

 Po<( flam li. = /'. eroeala Michx. 

 teste Munro, Jourii. Linn. Hoc. : 43 

 (1863). S.Chdpmdiiii'^WMiW. inlierb. 



A smooth upright showy grass, 

 80-150 em. high. Sheaths com- 

 pressed, about the length of the inter- 

 nodes, ciliatenear the throat: ligule 

 aciliatering: blades 3-5, tiat. eondu- 

 plicate or involute, 30-40 em. long, 

 5-8 mm. wide. Panicle ample, tinally 

 pyramidal, 20-30 or more cm. long. 

 rays clammy, capillary in sets of 

 2-4 or single, llower- bearing ])ut 

 little below the middle, hairy in the 

 axils. Spikelets very numerous, 

 linear-oblong, purple, 5 -7-flowered, 8-10 mm. long; empty glumes 

 1-nerved, ovate, muerouate, second 3.5-4 mm. long; iloral glume 4 



Fio. 93. — Sief/liiiffui seslerioides. 

 A, />, c, il, e, s|)iki'lct and dissec- 

 tions. (SLTibner.) 



