222 LEAFLETS. 



broadly so, from less than Yz to more than ^ inch long, on 

 broad flat petioles of more than equal length, the petioles and 

 rachis densely white wooly at first, this partly deciduous, the 

 pinnae approximate, sometimes more than once pinnate : 

 scapiform peduncles barely surpassing the leaves, sometimes 

 corymbosely branched and with 3 heads, other plants mono- 

 cephalous, these and the involucres strongly glandular-sca- 

 brous and viscid, never in the least either wooly or hirsute : 

 achenes fairly hispid rather than hirsute ; pappus short. 



Species of the Sierra Nevada of California exclusively, the 

 type Brewer's 1901 from Sonora Pass, at about 11,500 feet. 

 The heads of flowers in this stout dwarf are as large as those 

 of the largest species. 



Chaenactis imbricata. Suffrutescent and tall, the many 

 upright branches stout, somewhat tortuous, sparsely leafy up 

 to the corymbose summit ; all parts except the floral hoary 

 with a thinnish flocculent tomentum ; blades of the leaves of 

 ovate or lance-ovate outline, bipinnate, the primary pinnae 

 remote, their segments crowded, very small and rounded : 

 heads 1 to 5 terminating the branches, V\ inch high ; bracts 

 of the involucre very notably unequal, forming about 3 series, 

 all viscid-hirsutulous, not tomentose : achenes strongly stri- 

 gose-pubescent ; pappus paleae elongated but unequally so, 

 very thin and delicate. 



Known only from Wenatche Flat, Washington, where it 

 was collected in 1899, June 4, by Kirk Whited. Quite as 

 nearly shrubby as the Californian C. suffrutescens, but most 

 unlike that in all other characters. 



Chaenactis rubella. Dwarf perennial, the whole aerial 

 part of the plant only 1 to 1>^ inches high, the proper stems 

 much longer, but leafless and as if buried under sand or 

 scoriae, thus apparently springing severally from a single tap- 

 root: leaves many, % inch long or little more, ovate, obtuse, 

 closely pinnate and the pinnae pinnatifid, the segments mi- 



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