322 Carduaceae 



branches; principal bracts of the involucre 

 mostly thickened on the back by the broader 

 glandular-sticky ridge, comparatively small 

 and narrow, tipped with a short spreading 

 prickle ; corollas rose-colour or pale purple. 



In open grounds throughout the Rockies at 

 the lower altitudes; flowering during July 

 and August. 



Saussurea Nearly smooth, with a decum- 

 densaHook. bent base; 3-12 inches high. 

 Saussurea. Leaves thin, oblong-lanceolate, 

 acuminate, sinuate-dentate, or entire. Heads 

 of flowers several in a compact terminal 

 corymb, involucre campanulate, \ an inch 

 high; bracts lanceolate, acuminate, nearly 

 equal; corolla purple or violet-blue. 



On stony slopes or on the moraines at the 

 higher altitu'des throughout the Rockies, not 

 common, but freqeunt in the region around 

 Lake Louise; flowering during July. 



