686 CALIFORNIA ACADEMY OF SCIENCES. 



truncate or barely emarginate at both ends; oil tubes 2 to 

 4 in the intervals and 6 to 8 on the commissure; wings 

 somewhat corky-thickened next the seed; leaves lanceo- 

 late and the segments rather distant and larger; invol- 

 ucres and involucels as in the type species. The type of 

 this variety is Miss Eastwood's specimen from Durango, 

 Colorado, collected June 3, 1890. This variety was pre- 

 viously collected by me on May 2, 1890, at Cisco, Utah. 



Mr. Rose had studied this form and given it a name in 

 the National Herbarium, but now considers it to belong 

 to this species. 



Cymof tents montanus Nutt. 



What I take to be the typical form of this species, whose 

 home is on the plains of Colorado, Wyoming and New 

 Mexico, has the flowers sessile, or nearly so, among the 

 leaves, and even in fruit the peduncles are usually very 

 short, not as long as the leaves and decumbent; involucre 

 a narrow, irregular, hyaline border; involucels always 

 conspicuous, with very wide hyaline border and triangu- 

 lar and green center, but variable in size; flowers white; 

 fruit never wider than oval, usually 3" long; leaves never 

 sheathing above the ground, prostrate on the ground. 

 Specimens of this species in the National Herbarium are 

 from Fort Lyon, Arkansas, Palmer; Denver, Colorado, 

 Eastwood; Pueblo, Colorado, Hicks; No. 210 from Col- 

 orado, Hall and Harbour; Fort Russel, Wyoming, Ruby; 

 and Laramie, Wyoming, Nelson. 



C. MONTANUS var. PEDUNCULATUS. 



This is a peculiar form or quite possibly a new species 

 with long, erect peduncles often double the leaves, with 

 rays i' long; involucres reduced to a mere rudiment; in- 

 volucels linear to oblong and small; fruit small, about 

 22" long, oblong, emarginate above and below; wings 

 nearly i" wide, rather wider below, and gradually thick- 



