2 76 Cichoriaceae 



alternate or basal leaves and yellow or rarely 

 pink, blue, purple, or white flowers in in- 

 volucrate heads ; bracts of the involucre in i to 

 several series; flowers all alike and perfect; 

 corolla with a short or long tube and a strap - 

 shaped (ligulate) usually 5 -toothed limb (ray) . 



Heads solitary; leaves all basal. 



Achenes smooth at the apex. Agoseris. 



Achenes spinulose at the apex. Taraxacum. 



Heads several ; leaves not all basal. 

 Achenes flattened. 



Flowers yellow. Sonchus. 



Flowers blue. Lactuca. 



. Achenes rounded. 



Pappus white. Crepis. 



Pappus tawny. Hieracium. 



Pale and smooth throughout or 



a little woolly below. Leaves 

 glauca 



(Pursh.) linear-lanceolate or oblong, en- 

 Greene, tire, dentate or pinnatifid, 2-10 

 Large- inches long, acuminate. Scapes 

 stout, smooth or slightly hairy, 



Agoseris. J ' 



longer than the leaves, 6-18 

 inches high, head 1-2 inches broad, rays 

 bright yellow, involucre oblong, campanulate, 

 usually smooth. 



Open grounds and on grassy alpine slopes 



