WESTERN ASTKRACEAE. 13 



t^- 



->*^A-^-v . 



or three series and lanugiiious : rays many, rather short; 

 achenes hirtellous. 



Near Alkali Spring, Buffalo River, central Wyoming, 5 

 Aug., 1901, Merrill and Wilcox, their n. 1137 as in U. S. 

 Herb. 



Pyrrocoma plantaginea. Smallish plant, inhabiting 

 low subsaline soils ; the basal leaves entire, broadly or nar- 

 rowly lanceolate, apparently somewhat fleshy, glabrous, their 

 petioles short and, like the stems, dark-reddish or purplish ; 

 flowering stems 2 or 3 to 5 or 6 inches high, commonly mono- 

 cephalous, not rarely with 2 or 3 low-hemispherical heads ; 

 bracts of involucre rather herbaceous, in hardly more than 

 two series but unequal, puberulent and often more or less 

 uginous with loose deciduous wool which also often colors 



the younger parts of the stem : rays many, deep-yellow and 

 showy : achenes silky and pappus quite fine and soft. 



Apparently abundant in certain parts of the Yellowstone 

 Park, and southward in western Wyoming. Rydberg and 

 Bessey's n. 5051 as in U. S. Herb, represents a common 

 monocephalous form of it ; but it varies greatly, 



Pyrrocoma lapathifolia. Robust, upright, the several 

 stems 2 feet high, loosely racemose above the middle: basal 

 leaves 6 to 8 inches long including the very stout and rather 

 short petioles, apparently of subsucculent texture when fresh, 

 the blades oblong-lanceolate, or some with subcordate base, 

 entire, light-green, glabrous; cauline few, short, sessile and 

 half clasping, lanceolate, acuminate, spinulose-serrate : heads 

 long-peduncled, the peduncles reddened, somewhat flocculent, 

 quite woolly at summit just under the nevertheless glabrous 

 bracts of the involucre ; these very many and narrow-linear, 

 yet little imbricated, encompassing low-hemispherical heads 



inch wide. 

 Remarkable species, with basal leaves not unlike those of 



licifoli 



the cauline as 



different in form as can well be imagined. The specimen in 

 U. S. Herb, purports to have come from somewhere in Utah, 

 in 1875, by the hands of ly. F. Ward. 





