70 Key to the System of 



347. Marginal flowers with very slender corolla few ; fruits 



pointed. 



Herbs, mostly perennial ; leaves narrow, entire ; flower- 

 headlets on long stalks ; involucral bracts in many rows ; 

 fruits narrowly attenuated towards the summit ; pappus- 

 bristlets hair-like, rough or somewhat plumous. 



Leptorrhynchos. 1466 



Marginal flowers with very slender corolla numerous; 

 fruits blunt. 



Always herbaceous plants ; leaves scattered or at the root 

 crowded, entire ; headlets never large ; pappus-bristlets 

 uniseriate. Gnaphalium. 1472 



348. Headlets with staminate flowers and headlets with 



fertile pistillate flowers on distinct plants. 



Herbs, often tufted ; leaves entire ; flower-headlets often 

 crowded ; staminate and pistillate flowers entirely in 

 distinct headlets ; bristlets of the pappus thickened at 

 the apex. Antennaria. 1476 



Staminate flowers prevailing in the one kind of head- 

 lets, fertile pistillate flowers predominating in the 

 other. 



Herbs, often tufted ; leaves entire ; uppermost involucral 

 bracts forming a short ray. Figure 83. 



. Leontopodiuin. 1477 



349. Upper involucral bracts much pointed and recurved 



at the summit. 



Small annual herb ; leaves roundish, conspicuously stalked, 

 entire ; flower-headlets crowded amongst floral leaves ; 

 involucral bracts in a few rows ; pappus absent. 



Stuartina. 1478 



Involucral bracts all appressed or slightly spreading... 350 



350. Pappus consisting of scale-like segments. 



Small herbs ; leaves scattered, entire ; flower-headlets 

 terminal, solitary or crowded. Rutidosis. 1479 



Pappus absent. 



Shrubby or herbaceous plants ; leaves scattered, entire ; 

 involucral bracts in several rows ; flower-headlets 

 paniculated. Figure 85. Hnmea. 1482 



