or ey 
raras) 
8 Leaves of the branchlets abruptly and strongly 
ad 
Leaves of the branchlets gradually reduced, 
reduced, l-2 cm. long or less; stems 
glabrous and glaucous throughout 12. Ae laevis 
infrequently less than 2 em, long}; 
2k stems more or less pubescent 
)O Leaves (at least the upper) softly woolly on 
4 oa lower surfaces especially along the 
veins; bracts pubescent l3e A. Cusickii 
/O Leaves glabrous; bracts ciliolate on the 
i margins 
/® Bracts subequal, 5-8 mn. long, an 
occasional one rarely more; the 
clasping base of the upper leaves 
Io 5-8, rarely 10 mm, wide; ray corollas 
10-15 mm. long 
‘4 Plants prevailingly 60-80 cm, tall; 
, middle leaves rarely less than 1 
oe cm. wide, tending to elliptical -~ 
14, A. foliaceous 
/4 Plants prevailingly 30-60 cm, tall; middle 
leaves rarely more than 1 cm, wide, 
IBC 
tending to linear-oblong 15, A. Fremontii 
12 Bracts unequal, the outer 8-10 mm, long with one 
or two commonly longer, as much as 2,5 
CMe long and 3-4 mm, wide; the clasping 
[6 base of the upper leaves rarely less than 
10 mm. wide; ray-corollas 15-25 mm, 
long 16, A. Canbyi 
