16 LEAFLETS. 



Pyrrocoma halophila. Stems several, seldom 6 inches 

 high, rather rigid, ascending, racemose above the middle; 

 herbage pale and glaucescent, with or without traces of woolli- 

 ness : basal leaves lanceolate, entire or evenly serrate ; cauline 

 reduced, entire, verylanuginous at the sessile base only : heads 

 on slender pedicels, the involucres turbinate, less than Vq. inch 

 high, bracts oblong-linear, the outer obtuse, the inner acute, 

 all more or less lanuginous and most so marginally : rays few, 

 short. 



In an alkaline meadow, Goose Lake Valley, Oregon, 19 

 Aug., 1901, W. C. Cusick ; his n. 2769 as in U. S. Herb. 



Pyrrocoma duriuscula. Stems, few, erect, very hard, 

 rigid, glabrous, 2 feet high, simple and loosely spicate at sum- 

 mit, sometimes wath one or more spicate branches : basal leaves 

 narrow -lanceolate, pungently acute, perfectly entire, but 

 margins scabrous ; lower cauline lanceolate, sessile, sharply 

 serrate : involucres turbinate, more than ^ inch high, their 

 bracts much imbricated, of hard texture, with pungently acute 

 green tips and scabrous margins : rays few, short, deep-yellow : 

 pappus not very coarse. 



Stony ground somew^here in eastern Oregon at 3,500 feet 

 altitude, W. C. Cusick, Aug., 1897 ; n. 1755 as in U. S.Herb. 

 Also the same under number 530, collected in 1882. 



Pyrrocoma lanulosa. Of low growth, with copious basal 



leaves and decumbent stems of P, Jiirta, the foliage similarly 

 incise-serrate, but pubcvScence of the whole plant widely dif- 

 ferent, in no degree viscid or glandular, but dense, white, 

 softly villous, giving the appearance of w^hite-woolliness: heads 

 subracemose, 3 to 7, short-pedicelled ; involucres subturbinate 

 or broader, their bracts not many, subequal, lance-linear, pun- 

 gently acute, w^hitish-pubescent on the back : rays few, short, 

 inconspicuous. 



This does not appear to have been collected elsew^here than 

 in Lake County in southern Oregon ; the collectors being Mr. 



894) 



(1896). There are 



three sheets of it in U. S. Herb., that of Leiberg's n. 748 being 

 regarded as the type. 



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