216 PITTONIA. 
numerous heads 4 inch high ; bracts of the campanulate 
involucres in 3 series, none herbaceous, spatulate, with car- 
tilaginous base and erect acute green tips: rays about 30, 
broad and showy, flesh-color or purplish. 
A luxuriantly leafy species with large heads, both heads 
and foliage in some way recalling A. frondeus, though as to 
both the habit and inflorescence as well as the bracts, thor- 
oughly distinct from that and all others known. It was 
obtained by myself in September, 1896, among the wooded 
mountain summits above Cimarron, Colorado, where it 
adorns open and rather moist places among the woods and 
thickets. 
A. ADSURGENS. Stems low, forming loose but somewhat 
extensive masses through a system of branching rhizomes, 
the longest stems seldom a foot long, decumbent, or merely 
assurgent, loosely racemose or racemose-panicled above the 
middle: stem and branches notably pubescent, the foliage 
scarcely at all so: leaves of short sterile basal shoots crowded, 
oblanceolate, with dilated and partly sheathing base, very 
entire, acute, 2 to 4 inches long, 1-nerved or less distinctly 
3-nerved; those of the flowering branches linear, often 
somewhat faleate-curved, the margins scabrous: heads cam- 
panulate, $ inch high; bracts of involucre imbricated in 
about 4 series, the few outer ones herbaceous, oblong, 
obtuse, the others chartaceous in the main and white, but 
with erect, acute green tips: rays 25 to 30, rather short, 
white or with a more or less deep violet tinge. 
Common in open grass lands along dry runs among the 
foothills about Cimarron, Colorado, 30 Aug., 1896, collected 
by myself. The species, notwithstanding its low stature 
and depressed habit, with loose inflorescence and large 
heads, is strictly an ally of A. multiflorus, especially of its 
