61 



General distribution: California to Washington and Idaho. Type in the herbarium 



of the Royal Gardens, Kew, England, collected on the "plains of the Columbia." 

 Specimens examined. — California: San Jose (ex herb. State Normal School); Ojai 



Valley (F. W. Hubby 36). Oregon: Gearhart (C. L. Shear 1734i, a form 



approaching B. marginatiis); near Rhea Creek (J. B. Leiberg 65); (W. C. Cusick 



1:521). Washington : Klii'kitat County (W. N. Suksdorf 16) ; Seattle (C. V. Piper 



and E. C. Smith 944); (C. V. Piper 818). Idaho: Valley of Clearwater River 



(Sand})erg, Heller & McDougal 166). 

 This \ariety passes by various intermediate tonus into the species and also into B. 



inargitiatas. It is so inconstant 



in character that it does not 



seem advisable to try to hold it 



to specific rank. Through the 



kindness of Sir W. T. Thiselton- 



Dyer, director of Kew Gardens, 



we ha^■e been permitted to 



examine a spikelet from the 



original specimen collected l^y 



Douglas on "Upland dry soils 



on the ^lultoonah (Oregon) 



1826." This leaves no doubt 'as 



to the form which Hooker took 



as the type of his Ceraiochdoa 



grand iflora. 



35 r. BROMTJS CARINATUS 

 DENSTJS n. var. 



A tall, stout, erect plant, withadense 

 panicle 3 dm. long. It differs 

 from the species in its stouter 

 habit, smoother leaves and 

 sheaths, the leaves Ijeing smooth 

 or merely scabrous, and the 

 panicle with numerous rays, 

 some of the lower being com- 

 pound and bearing many spike- 

 lets. The spikelets are narrow, 

 2-2.5 cm. long, with the florets 

 subdistant, showing the slender 

 scabrous rachilla when in flower; 

 empty glumes as in the species; 

 flowering glume coarsely scab- 

 rous, about 1 cm. long; awn 

 slender, 5-7 mm. long. 



Type collected by Blanche Trask 

 " about opuntia" on San Nicho- 

 las Island, California, No. 12, April, 1897. The specimen cited shows only the 

 panicle and the upper leaf. We should be inclined to give this si^ecific rank 

 but for the fact that accompanying specimens from the same island show forms 

 connecting it with the species. 



35(5. BROMUS CARINATUS LINEARIS n. var. (Fig. 39.) 

 A somewhat ctespitose plant, with slender, nearly erect tnilms and very narrow linear 

 leaves. It differs from the typical form of the species in its narrow, subracemose 

 panicle, 5-10 cm. long, and in its shorter and narrower leaves. The spikelets 



Fig. 38. — Brinmis carinatua hookfrianus : u, an entire 

 spikelet; b, flowering glume without the awn; c, cary- 

 opsis showing plumose apex; d, sterile flower showing 

 the lodicules. 



