1436 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM 



Heads 15 to 45-flowered, 5 to 11 mm. high; phyllaries 

 2 to 5-costulate. 

 Pedicels glabrous though sometimes glutinous. 

 Heads 5 to 6 mm. long, in terminal long-peduncled 



corymbs 48. E. blepharolepis. 



Heads 7 to 9 mm. long, in leafy-bracted panicles. 



79. E. glabratum. 

 Pedicels villous or glandular-pubescent. 



Corollas yellowish to greenish white, dotted with 

 conspicuous orange or brown glands; phyl- 

 laries green 49. E. nelsonii. 



Corollas purple to rose (rarely white), not con- 

 spicuously dotted; phyllaries usually purple- 

 tinged. 

 Heads 4 to 6 mm. high; leaves not reticulate, 

 at base acute to subcordate with open 



sinus 39. E. pycnocephalum. 



Heads about 1 cm. high; leaves reticulate-veiny 

 beneath, cordate with closed sinus. 



50. E. phoenicolepis. 

 DD. Heads 50 to many-flowered; receptacle distinctly convex, ellip- 

 soidal or subconical, conspicuously alveolate. 

 Phyllaries 2 to 5-costulate; leaves palmatel}' 3-nerved practically 



from base 35. E. azureum. 



Phyllaries obscurely' nerved or nerveless; leaves pinnately 5 to 9- 



nerved from well above base. (Showy, nearly herbaceous under- 



shrubs, known chiefly through horticulture and of very doubtful 



distinctness.) 



Phyllaries lance-oblong, 2 to 2.5 mm. wide; pubescence fuscous. 



51. E. constipatiflorum. 

 Phyllaries lance-linear, mostly 1 to 1.5 mm. wide; pubescence 

 not fuscous. 

 Pubescence of stem and inflorescence long, deeph' colored, red 



or purple 52. E. atrorubens. 



Pubescence dull, tawny or rusty, sometimes reduced to mere 

 puberulence. 

 Leaves suborbicular, sometimes 30 to 40 cm. in diameter, 

 acute or obtuse; style branches azure. 



53. E. megalophyllum. 

 Leaves broadly ovate, 10 to 15 cm. wide, acuminate at apex, 

 blunt to subtruncate or even shallowly cordate at base; 

 style branches clear rose-color. 



54. E. thespesiaefolium. 



Leaves ovate-oblong to elliptic, usually pointed at base, 



mostly 6 to 9 cm. wide. 



Leaf blade ovate-oblong, about two-thirds as wide as 



long; petiole one-fifth to fully one-half as long as blade. 



55. E. sordidum. 



Leaf blade elliptic-oblong, less than half as wide as long; 



petiole very short, not one-tenth as long as blade. 



56. E. miradorense. 

 CC. Phyllaries subequal, in about 2 scarcely imbricate series, usually 1 to 

 3 of the outermost phyllaries much shorter. Section Eximbkicata. 

 E. Heads 3 to 8 (to 10) -flowered. 



Leaves pinnately veined 59. E. ligustrinum. 



