COMPOSITES FROM OREGON. l7 



Pyrrocoma TurbinelIvA. Stems several, slender, ascend- 

 ing, 7 to 9 inches high, scarcely leafy, loosely corymbose pan- 

 icled above : basal leaves 3 or 4 inches long, lanceolate, acute, 

 remotely and rather coarsely incise-serrate, the short petioles, 

 the basal part of stems very softly silky-lanuginous and quite 

 retrorsely so ; cauline leaves small, oblong, very acute: heads 

 ^2 inch high, with involucres exactly turbinate ; bracts imbri- 

 cated but not very numerous, linear, very acute, erect, cinere- 

 ously pubescent with a short, stiff viscidulous indument : rays 

 few, not showy, light yellow : pappus not copious, rather 

 delicate. 



In dry ground, Cycan Valley, eastern Oregon, W. C. Cusick, 

 1901 ; his n. 2744 as in U. S. Herb. 



Pyrrocoma cuspidata. Stems slender, arcuately ascend- 

 ing, 7 to 9 inches high, more corymbose at summit, the heads 

 about 3 only : basal leaves lanceolate, depressed, glabrous, 

 finely and evenly serrulate or else quite entire ; cauline re- 

 duced, entire, acute : heads Yz inch high, broadly turbinate, 

 the bracts strongly imbricated and numerous, linear-oblong, 

 cuspidately acute, glabrous except as to the lower, these not 

 pubescent but only ciliate : rays short, but rather many, 

 golden-yellow : pappus firm . 



Margin of Cycan Marsh, eastern Oregon, W. C. Cusick, 10 

 Aug., 1901 ; part of his u. 2741 as in U. S. Herb. 



Pyrrocoma i,iatriformis. Stoutish, rigid, two feet high, 

 loosely racemose from above the middle : foliage firm, rather 

 deep-green underneath a sparse but definite grayish pubescence: 

 lowest leaves 6 or 8 inches long, petiole and blade subequal, 

 the latter lanceolate, entire ; those of the raceme reduced to 

 sessile lanceolate bracts : heads turbinate, yi inch high, at 

 summit quite as wide exclusive of the few rays ; bracts of the 

 involucre very many, strongly imbricated, linear and coriaceous 

 below the lanceolate and greenish but whitish- villous tips, 

 these apt to be a little squarrose. 



Known to me only as collected at Pullman, Washington, 



