324 Key to the System of 



1457. Somewhat woody. 



Rather tall, often but imperfectly beset with somewhat 

 cottony vestiture, sometimes sticky ; leaves mostly 

 linear, occasionally quite short ; headlets of flowers 

 small, crowded into generally ample corymbs, almost 

 bellshaped-semiovate; involucral bracts yellow, seldom 

 brownish, always shining, ciliolated, acute, mostly curved 

 outward ; fruits glabrous ; pappus-bristlets plumously 

 dilated at their summit, on some the marginal flowers 

 absent or reduced. H. semipapposum. 



Quite herbaceous. 



Rather dwarf, often extensively beset with a somewhat 

 cottony or appressed and rather shining vestiture ; leaves 

 mostly from elliptic- to linear-lanceolar, flaccid and 

 often flat ; headlets of flowers small, few or several 

 crowded terminally, almost bellshaped-semiovate, hardly 

 ever solitary ; involucral bracts yellow, seldom brownish, 

 only exceptionally white or red, always shining, ciliolated, 

 acute ; fruits glabrous ; pappus-bristlets few, plumously 

 dilated at their summit, on some of the marginal flowers 

 absent or reduced. H, apiculatum. 



1458. Inner involucral bracts forming a short white ray ... 1459 

 Involucre rayless ... ... ... ... . 1462 



1459. Leaves minute. 



An alpine shrub, much branched, somewhat sticky ; leaves 

 closely crowded, concealing the branchlets, sessile, 

 appressed, from ovate- to cordate-orbicular, repressed 

 at the margin, soon almost glabrous above; headlets of 

 flowers very small, few or several closely together at the 

 summit of most of the numerous short branchlets, sessile ; 

 outer involucral bracts pale-yellowish ; flowers few within 

 each involucre ; fruits papillular-rough. 



H. baccharoides. 



Leaves elongated ... ... ... ... ... 1460 



1460. Leaves revolute along the margin. 



An alpine shrub, rather tall, usually much beset with a 

 short close vestiture, not seldom sticky ; leaves firm, 

 broadish-linear, often blunt, revolute, occasionally 

 abbreviated, usually rough on the upper side ; headlets of 

 flowers quite small, numerous, densely crowded into com- 

 pound corymbs; outer involucral bracts often brownish 

 or reddish ; expansions of the inner bracts sometimes 

 tinged with red ; flowers rather few within each in- 

 volucre ; fruits papillular-rough. 



H. rosmarinifolium. 



