160 PITTONIA. 
the leaves lanceolate, 3 to 5 inches long, exceeding the inter- 
nodes, more or less tapering to the base and, except the 
uppermost and somewhat spatulate pairs, short-petiolate ; 
pubescence fine but not tomentulose, the margins saliently 
dentate: no hairs even of stem or peduncles gland-tipped : 
involueres campanulate, their biserial bracts cuneate-oblan- 
ceolate, nearly acutish : rays light-yellow, broader and shorter 
than in the last, 8-nerved: disk-corollas slender, the long 
tube villous, the narrow throat glabrous, the elongated teeth 
slightly bristly: achenes setulose; pappus dull-white, merely 
barbellulate. 
Also British Columbian, being n. 19,646 of the Canadian 
Survey, collected on Maclennan River, another tributary of 
the Columbia, by Mr. Spreadborough, 27 July, 1898. It 
can not be referred to A. Chamissonis, since it lacks the 
distinctly obovate leaf-cut, the broad, short disk-corollas, 
and the tawny subplumose pappus of that species. The 
pubescence is also very different. 
v A. Macoun. Allied to A. amplericaulis, Nutt, but 
taller, often 2 or 3 feet high; leaves spatulate-lanceolate and 
lanceolate, sessile and amplexicaul, often 4 inches long, less 
than an inch in width, lightly serrate rather than dentate, 
the margins scaberulous, the upper face with scattered short 
hairs not pustulate; inflorescence rather ample, corymbose- 
panicled, the peduncles clothed with short hairs tipped each 
with a large gland: campanulate involucre not in the least 
glandular, its short lanceolate bracts sparsely hispidulous- 
hairy: rays about 6-nerved, deeply notched (2-toothed): 
disk-corollas with short hispidulous tube and much longer 
funnelform glabrous throat: achenes slender, strongly- 
ribbed, sparsely short-bristly and with a similar distribu- 
tion of sessile glands; pappus short, rigid, loosely bar- 
bellate, fuscous. 
