330 Key to the System of 



STUARTINA. 



1478. Headlets few-flowered, capitular-crowded. 



Often quite dwarf, beset with somewhat cottony vestiture ; 

 leaves very small, flaccid, flat, occasionally verging into 

 an elliptic form ; headlets minute, their clusters surpassed 

 by the floral leaves ; involucres rather dark -colored ; 

 fruits glandular-rough. S. Muelleri. 



XtUTXDOSXS. 



1479. Annual, minute. 



Glabrous or scantily beset with interwoven hairlets ; leaves 

 quite short, linear, some opposite ; headlets of flowers 

 extremely small, often several terminally placed together, 

 each supported by floral leaves ; involucral bracts whitish, 

 blunt, smooth, entire ; corolla sometimes greenish ; pappus- 

 scalelets spatular- or lanceolar-ovate, often placed ob- 

 liquely, without any ciliolation ; fruits papillular-rough. 



B. Pumilo. 



Perennial ... 1480 



1480. Leaves mostly radical. 



Somewhat beset with interwoven hairlets ; stems hardly 

 branched ; leaves mostly broad-linear, revolute along the 

 margin, soon almost glabrous ; headlets of flowers rather 

 large, singly terminal, nearly hemispherical ; involucral . 

 bracts pale-yellowish, acute, neither wrinkled nor cilio- 

 lated, the inner acute, the outer blunt ; pappus-scalelets 

 elliptic-spatular, subtle-ciliolated. K. leiolepis. 



Leaves scattered ... ... ... ... ... 1481 



1481. Involucral bracts smooth. 



Scantily beset with interwoven hairlets ; stems hardly 

 branched ; leaves mostly broad-linear, revolute along 

 the margin, the upper abbreviated ; headlets of flowers 

 singly terminal, nearly hemispherical ; involucral bracts 

 yellowish, somewhat foliaceous towards their base, the 

 inner ciliolated towards the summit ; pappus-scalelets 

 narrow-lanceolar, plumously ciliolated ; fruits papillular- 

 rough. H. leptorrhynchoides. 



Involucral bracts wrinkled. 



Finally somewhat tall, closely or imperfectly beset with in- 

 terwoven hairlets ; stems branchless or scantily branched ; 

 stem-leaves broad-linear, revolute along the margin, the 

 upper gradually shortened, the lowest somewhat dilated ; 



