168 PITTONIA. 
A. OVALIFOLIA. Stems several, a foot high or more, sim- 
ple, leafy from the middle, the solitary head long-pedun- 
cled: leaves in 2 or 3 pairs, oblong-ovate and oval, 14 to 
21 inches long, abruptly euneate at base and sessile, sharply 
serrate or dentate, sparsely strigulose and densely though 
minutely glandular-punetate on both faces: upper part of 
peduncle and base of involucre villous-hirsute; bracts of in- 
voluere uniserial broadly linear-lanceolate, acuminate, 
sparsely hirsute and viscidly glandular: achenes sparsely 
hirtellous, the hairs all gland-tipped; pappus white, bar- 
bellulate. 
Big Horn Mountains, Wyoming, at 9,000 to 10,000 feet, 
17 July, 1890, Mr. Blankinship. Resembles a small and 
simple-stemmed A. latifolia, but the foliage is of thicker and 
firmer texture, and the glandular indument of leaves and 
achenes are very characteristic. 
* * Allies of A. FOLIOSA; leaves numerous, rather long and 
narrow ; herbage more or less hoary-tomentose. 
A. TOMENTOSA. J. M. Macoun in Herb. Dwarf,the densely . 
tufted stems 2 to 4 inches high, mostly monocephalous, 
rarely with two or more heads: radical leaves oblanceolate, 
obtuse, 3-nerved, 1 to 14 inches long. the single cauline pair 
inserted near the base of the stem, lanceolate, sessile, entire, 
somewhat arachnoid-tomentose and obscurely glandular: 
bracts subtending the short peduncled heads small, lanceo- 
late, sessile: upper part of stem, the peduncle and involucre 
- white with a dense villous tomentum: bracts of the involucre 
uniserial, lanceolate, obtusish: rays bright-yellow, 7-nerved, 
sparsely villous externally : disk-corollas with villous tube 
and glabrous almost cylindric throat; achenes densely 
silky-villous; pappus white, barbellate. 
