448 



i'ual'k.e. 



long ;is tlio noilos, ciliiite :it the throat; bladi's invohite. sniootli bo- 

 low, tliosf of tlu' ciiliii l.j-4() cm. lon<jf with lilifonn tips. I'iiiiich; 

 scarcely cxsertcd, pale, 15-'i0('iii. long, 0-10 nun. wide. Spikelet-s 

 'i-tlowered: empty glnrnes very tliiji and .'^earioii.s, 1 -nerved, a})ex 

 irregularly 2-3-t()othed. first ;J mm. long, second 3.5 mm. long; 

 lloral glume broad, truncate. 2.2 mm. long, hirsute below on the 

 keel and lateral nerves, r)-T-nerved, awns about IT, the stouter 

 ones 4-5 mm. long, (ii'ain 1.7 mm. long. 



Texas, NealU'n for U. S. Nat. Mus. : New >rcxico, Wriyht 435, 

 20-,^(t: Mexico, Palmer 350. 13(;o, 130-.', Prinyh l!t:3. 



Texas to Arizona and Mexico. Very nearly allied to, if not 

 identical with, /*. I(if/N)'oi(leu7ii Schrad. 



2. P. Wrightii S. Wats. I'roe. Am. Acad. 18:178 (1883). P. 

 horcalc Torr., not (Iriseb. 



A rather slender branching erect or geniculate perennial. 20- 



40 cm. Iiigh; nodes villous. Sheaths 

 pubcrulent, ciliate at the throat; 

 blades involute, those of the culm 

 2-8 em. long, 0.3-0.8 mm. diam. 

 Panicles terminal and axillary, often 

 more or less included by the sheaths, 

 lead-colored or pale, spikelike, 1-7 

 cm. long. 5-8 mm. diam. Sjjikelets 

 l-3-11owered ; empty glumes thin 

 and scarious. 5-7-nerve( icute or 

 toothed, sjiaringly puberulent uiuler 

 a lens, first 3.5-4.5 mm. long, sec- 

 ond 1 mm. longer; fioral gluma 

 hirsute on the central and lateral 

 nerves, oval. 2-mm. long, 0-nerved, 

 the !) awns 3-5 mm. long. 



'JY'xas, lldntrd, Junes; Arizona, 

 Primjle in 1884, Lemmon 30()3; California (Los Angeles), Palmer 

 511. 'J'he latter says: '* Kare. found oidy :\ the h'gher ridges 

 back of the bay." Mexico. Parri/ A- Painter 847, Palmer 1361. 

 Texas to Arizona, California and Mexico. 



Fig. 8i3. — Pa p p oph o r n m 

 Wriijlitn. A. si>ik<'li't ; '', 

 Horcts; b, tloi'iil glmiic. (.' rib- 

 ncr. ) 



