396 



COMPOSITAE. 



closely imbricated, slender, appressed at base, spreading and 

 hooked at tip; flowers perfect, all tubular, purple; receptacle 

 bristly; akenes oblong, transversely wrinkled ; pappus of numerous 

 short rough bristles. 



Arctium minus Schk. Stems stout, branched, 1-2 m. high; leaves broadly 

 ovate, mostly cordate, obtuse, entire or more or less dentate, floccose-woolly 

 beneath, the basal ones 30-50 cm. long; petioles channelled ; heads subracemose, 

 15-30 mm. broad; involucre glabrous or cobwebby; tegules arcuate, spreading. 



Common in waste places. 



550. SAUSSUREA. 



Perennial leafy stemmed herbs with corymbosely clustered 

 medium sized heads of purple flowers; heads many-flowered; 

 involucre oblong to obovoid; tegules imbricated, appressed, 

 obtuse; receptacle bristly; flowers all alike, tubular, perfect; 

 style branches slender; akenes oblong; pappus double, the larger 

 bristles numerous, plumose, united in a ring and falling together; 

 outer bristles similar but smaller and less plumose or naked. 



Saussurea americana D. C. Eaton. Sparsely arachnoid-tomentose; stems 

 stout, erect, 30-120 cm. high, leafy; basal leaves ovate to oblong-ovate, sub- 

 cordate, acute to acuminate, mostly dentate, pubescent beneath, petioled; 

 cauline similar, sessile by a narrow base or the uppermost lanceolate: heads 

 10-17-flowered, numerous, in panicled cymes; heads 12-15 mm. high; involucre 

 ovoid-cylindric, pubescent; tegules obtuse in 5 or 6 series; flowers blue-violet. 



Alpine meadows at about 2000 m. altitude. Especially abundant in the 

 Olympic Mountains. 



SUMMARY. 



