88 



lower 5-6 mm. Ion?, upper 6-7 mm. long, slightly broader; flowering glume 



subacute, 9-11 miti. lonrj, softly pubescent over the had; 5-7-nerve(l, only 3 nerves 



very distinct, hyaline at the apex and emarginate, awn 2-3 mm. long; palea 



puberulent, nearly equaling its glume. 

 Type collected by J. G. Smith at Mangos, New Mexico, August 19, 1897. 

 Specimens ex.\mixed. — Xen' Mexico: Mangos Canyon (J. G. Smith, Sept. 21, 1896); 



(0. Metcalfe, Sept. 20, 1897); Saddle Rock Canyon, Grant County, alt. 2,170 



meters (J. G. Smith, Sejit. 2-1, 1896) . 



Base of San Luis Mountains, International Boundary Collection (E. A. Mearns 

 2146).- 



This plant, whose favorite hab- 

 itat seems to be among 

 cliffs in canyons, may prove 

 on further held study to be 

 found worthy of specific 

 rank. The herbarium 

 specimens differ from the 

 species in their very weak, 

 leafy culms, rather nar- 

 rowerandlessdensely flow- 

 ered spikelets with the 

 empty glumes smooth. 



20. BROMUS PACIFICUS 



n. sp. (Fig. 21.) 



A stout, nearly erect perennial 

 10-1.5 dm. high. Culm 

 leafy, pubescent at the 

 nodes. Sheaths mostly 

 sparsely retro rsely-pilose; 

 ligule 3-4 mm. long, round- 

 ed above, somewhat lace- 

 rate dentate; UaiJett hroadlt/ 

 linear-lanceolate, J-S.5 dm. 

 long, 8-11 mm. broad, 

 sparsely coarse-pilose above, 

 scabrous beneath. Panicle 

 rather large, dense, droop- 

 ing; lower branches se- 

 cund, 3-5. SpiMets 2-2.5 

 cm. long, 5-6 mm. vide, 

 7-11-flowered, coarsely pu- 

 bescent tJiroughout ; empty 

 glumes acute, the lower 

 rather narrow, 1-nerved or 

 rarely with two short faint 

 lateral nerves, 6-7 mm. long, the upper broader, 3-5-nerved, mostly inequilateral at 

 the apex anil mwronate, 8-9 mm. long ; flowering glume inconspicuously 7-nerved, 

 broadly lanceolate, subobtuse, emarginate, 11-12 mm. long, pubescence somewhat 

 denser and somewhat pilose on the lower margins and base, with a, straigld «»■/( -^-6" nun. 

 long ; palea about equaling its glume. 

 Type No. 1703, collected by Scribner & Shear, in moist thickets near the seashore 



south of Seaside, Oregon. 

 General distribution: Along the coast from Oregon to Alaska. 



Fig. 20. — Jjromius portcri frundo.su.'i : a, empty glumes and two 

 florets; b, dorsal view of a flowering glume. 



