10 NATTJEAL GROUPS. 



b. Auriculae, — Stem corymbose at the top. Inner phyllaiies obtuse. 

 2. H. aurantiacum. 



II. PirLMOlfAIlEA.— Eoot-leaves persistent; forming radical 

 rosettes (rosulate tufts of leaves) in autumn. Involucre 

 interruptedly and irregularly imbricate. Fruit short, 

 truncate, not crenulate at the top, striate. Hairs of the 

 pappus unequal, rigid. 



a, Alpinse. — Involucres Bhaggy or silky : OMter phyllaries lax ; inner 

 ones acuminate or acute. Florets hairy externally, more or 



b. Nigprescentes. — Involucres villous or hairy. Phyllaries oppressed, 

 or few outermost lax. Florets nea/rly or quite destitute of hairs 

 externally, minutely pilose or sub-glabrous at the tips. 



C. Pallidae, — In/oohtcres more or less hairy. Phyllaries oppressed. 

 Florets without hairs externally, nearly or quite glabrous at 

 the tips. 



* Styles yellow, rarely with very minute fuscous hairs. 

 16. H. pallidum. 

 16. H. lasiophyllum. 



