52 PINK ORDER 



the involucres in racemes, panicles, or heads; leaves simple, usually entire, 

 alternate, opposite, whorled or basal ; annual or perennial. 

 1. Flowers white or pink 



a. Flower involucres in dense heads or head-like 



clusters 



(1) Heads single on leafless stalks 



(a) Leaves ovoid to elliptic, densely white- 

 woolly E. ovalifolium 



(b) Leaves oblanceolate or linear 



x. Leaves' oblanceolate, densely white- 

 woolly E. multiceps 

 y. Leaves linear, green, usually smooth E. pauciHorum 



(2) Heads many in forking leafy clusters; 



leaves oblanceolate, woolly E. Jdmesii 



b. Flower involucres in forking cymes or in a 



long spike-like cluster 

 (1) Flowers in forking cymes 



(a) Stems leafy 



x. Perennials, the stems woody at base, 

 and branched 

 (x) Leaves ovate to elliptic ; branches 



few e. Jonesi 



(y) Leaves linear to oblong; branches 

 several to many 

 m. Stamens and styles included E. effusum 



n. Stamens and styles exserted E\ corymbosum 



y. Annuals, the stems simple at base, 



densely white woolly E.annuwn 



(b) Leaves basal 



x. Leaves linear to oblanceolate, greenish 



above, white-woolly below E. Simpsoni 



y. Leaves ovoid to orbicular 



(x) Flower involucres hanging E. cernuum 



(y) Flower involucres erect or ascend- 

 ing 

 m. Annual; stems single; leaves 1-5 



cm. long, green' E. Gordoni 



n. Perennial ; stems tufted ; leaves 

 5-15 cm. long, densely white- 

 wooll y E. tenellum 



