270 ASTER FAMILY 



m. Stems 1-8 in. high, mostly single; 

 leaves mostly basal, stem leaves 

 small ; rays white to blue E. uniflorus 



n. Stems 6-15 in. high, clustered, very 

 leafy ; leaves entire to toothed ; 

 rays white to rose-purple E. eldtior 



(y) Involucres white-bristly to glandu- 

 lar or smooth, but not woolly 

 m. Stems 2-8 in. high, 1-headed, tufted ; 

 leaves mostly basal 

 (m) Involucre dotted-glandular ; 



leaves smooth, spatulate to 

 obovate ; rays violet E. leiomeras 



(n) Involucre with at least some 

 white-bristly hairs, often 

 densely so, sometimes gland- 

 ular also 

 r. Leaves obovate, gray-hairy ; 



rays violet E. tener 



s. Leaves linear to linear-oblance- 

 olate, hairy ; rays white to 

 blue-purple 

 (r) Leaves glandular as well 



as hairy E. glandulosus 



(s) Leaves not glandular, more 



or less gray-hairy E.radicdtus 



n. Stems 8 in.-3 ft. high, or if lower 

 with several heads, more or less 

 leafy ; heads in most very large 

 (m) Heads small, the disk usually 1 

 v cm. or less ; stems tufted 

 r. Stems with long bristly white 

 hairs ; leaves mostly linear, 

 rays white to blue E. pumilus 



s. Stem with soft close hairs ; 

 leaves lanceolate to spatulate ; 

 rays white to blue E. caespitosus 



(n) Heads large, the disk 1-2 cm. 

 wide; stems single or 

 clustered 



