NEW OR NOTEWORTHY SPECIES. 169 
sparingly leafy throughout and abundantly floriferous; herb- 
age canescently tomentulose, the short pedicels and involu- 
cres viscidulous: leaves pinnately parted into few and re- 
mote linear entire or cleft segments: heads 4 or 5 lines bigh: 
corollas all equal, dull-white: achenes slender, terete, pale, 
densely hispidulous: pappus of 4 lanceolate aeuminate 
pales as long as the corolla, with minute rudiments of 1 or 2 
exterior ones. 
Common in the West Humboldt Mountains, Nevada, where 
it was colleeted by the author in 1894. A very profuse- 
flowering but homely species. 
Senecio Macountr. Tufted and apparently somewhat 
B selenite perennial, the slender nearly naked stems 
/ about a foot high, simple, subcorymbose at summit, leafy 
below, floccose-tomentose throughout: leaves chiefly at and 
near thé base of the stem, hoary-tomentose beneath, more 
deciduously so above, 3 to 6 inches long including the 
slender petiole, this much longer than the obovate or oblong- . 
lanceolate or oblanceolate blade, which is 3-nerved and with 
variously crenate, or dentate or repand-denticulate margin ; 
heads small (as in S. Fendleri), in a rather compact cymose 
corymb: bracts of the involucre about 12 or 15, lanceolate, 
thinnish: rays as many, yellow: achenes light-colored, 
5-angled, with 5 intervening strie; pappus fine and soft. 
Mt. Benson, Vancouver Island, 1893, Mr. John Macoun. 
SENEcIO LUGENS, Richardson, Appx. Frankl. 19 & 20. 
With this subarctic species a very considerable number of 
different plants have been confused by recent American 
botanists ; species occupying various regions all the way be- 
tween subarctic America and Mexico. Two such, belonging 
to our western mountains exclusively, namely S. atratus and 
S. spherocephalus, were segregated by me, and defined at 
pages 105 and 106 of this volume; and in the working out 
of those species I had reached the conclusion that nothing 
