304 Key to the System of 



Semiherbaceous. 



Dwarf, somewhat beset with rigid hairlets ; leaves linear, 

 sessile, pointed, at the margin revolute ; headlets of 

 flowers rather small, singly terminal on long and slender 

 stalks, the latter often slightly cottony towards the 

 summit ; fruits somewhat or hardly beset with hairlets. 



A. Huegelii. 



1378. Headlets of flowers usually solitary ... ... 1379 



Headlets of flowers racemose or corymbose .. ... 1380 



1379. Leaves always large. 



Shrub, rather tall, much beset with a velvet-like whitish or 

 somewhat brownish vestiture ; leaves from cordate- to 

 elliptic-ovate, entire, but slightly wavy at the margin, 

 nearly glabrous and much wrinkled above ; headlets of 

 flowers very large, on long stalks ; floral ray much 

 elongated, white or somewhat purplish ; fruits beset 

 with shining appressed hairlets ; bristlets of pappus 

 copious. Figure 81. A. pannosus. 



Leaves small. 



A desert-shrub, finally rather tall, much beset with a close 

 grey vestiture ; leaves mostly from elliptic- to ovate- 

 cuneate, recurved at the margin ; headlets of flowers 

 short-stalked ; floral ray white ; fruits densely beset 

 with hairlets. A. pimeleoides. 



1380. Leaves broad ... ... ... ... ... ... 1381 



Leaves very narrow ... ... ... ... ... 1382 



1381. Vestiture silk-like. 



Shrub, from somewhat dwarf to rather tall, much beset 

 with a silver - shining appressed sometimes reddish 

 vestiture ; leaves firm, musky scented, from obovate- to 

 lanceolar-elliptical, often denticulated or occasionally 

 deeply indented, above glabrous and reticular-venulated ; 

 headlets of flowers somewhat corymbously arranged or 

 only three or two together, seldom solitary ; involucre 

 narrow; few or even only two of the corollas flatly 

 expanding, their lamina white ; fruits soon glabrous. 



A. myrsinoides. 



