TARAXACUM IN NORTH AMERICA. 229 
V T. RUPESTRE. Small and slender, the scapes 4 to 6 inches 
high and surpassing the rather narrow foliage; herbage 
glabrous: leaves narrowly oblanceolate in general outline, 
acute, from saliently runcinate-toothed to runcinate-pinna- 
tifid: rather narrow involueres, dark green as in the last, 
but of very few bracts, those of the calyculate set scarcely 
biserial, ovate, erect, of the inner lance-linear, the innermost 
with broad scarious margin below, some of them more or 
less plainly corniculate at tip: achenes of notably cuneiform 
outline and truncate at the prickly summit, the ribs below 
somewhat distinctly toothed or serrated; stipe of pappus a 
trifle longer than the achene. 
An exclusively British Columbian mountain species, as 
far as known, the best type, Mr. Macoun’s n. 15,111, from 
an altitude 6,000 feet on Mt. Queest, where it was found occu- 
pying the crevices of rocks. His n. 15,110 from Kicking 
Horse Lake is quite the same; and also other excellent 
specimens by him were taken at an altitude of 8,000 feet on 
Mt. Avalanche of the Selkirk Mountains. Distinct from A. 
Chamissonis by its very simple involucre and short pappus- 
stipe, as it is from the next by its dark involucre and slender 
habit. 
* T. ovinum. Dwarf, apparently alpine or subalpine, with 
large deep root and small Jeaves and scapes, the latter only 
2 or 3 inches long and barely equalling the leaves, tomentose 
under the involucre, the whole plant otherwise glabrous: 
leaves oblanceolate, obtuse, occasionally quite entire, or at 
least only obscurely denticulate, more usually quite plainly 
runcinate-toothed or even coarsely so: bracts of involuere few 
and all remarkably broad, those of the outer and calyculate 
double series ovate, with scarious margins and an abrupt 
short truncate apiculation, those of the inner series alter- 
nately lance-linear and ovate-lanceolate, these broader ones 
