170 PITTONIA. 
properly referable to S. lugens is known to oceur upon United 
States territory, or even very near our borders. Since then 
I have been favored by the Messrs. Macoun with a very use- 
ful series of specimens collected at and near the original far- 
northern locality of S. lugens, one of the sheets containing a 
couple of duplicates collected by Richardson himself; and 
the evidence is even more full than I had anticipated, to the 
point that true S. lugens is strictly subarctic, not reaching 
even the mountain distriets of the Northwestern States. 
Chief among the errors which seem to have misled authors 
as to the identity of S. lugens is that of Sir William Hooker, 
who figured for that species, in his Flora Boreali- Americana, 
a plant which is far enough from answering Richardson's 
very full and satisfactory description. 
The habitat of S. lugens, as shown by the Canadian Geo- 
logieal Survey collections, is the interior of British America 
from about Great Slave Lake and its tributary rivers north- 
ward to the coast of the Arctic Sea; some taller plants with 
thinner and more glabrous herbage, as well as a more lax 
infloreseence, and narrower involucral bracts, possibly ref- 
erable here, and also possibly representing quite another 
species, are from as far southward as the “ Bow River Pass, 
Rocky Mts.,” collected by Mr. Macoun in 1879, and at 
“ Kananaskis, Rocky Mts.,” by the same, in 1885. But the 
plant figured by Hooker under this name is very different 
from these, and is common in southern British Columbia, as 
also in certain parts of Washington and Idaho, Oregon and 
even northern California. This forms a part, and only a 
part, of Gray’s S. lugens foliosus. It ma y be named and dis- 
tinguished as follows: 
SENECIO CorUMBIANUs. Taller and stouter than S. lugens, 
often 3 feet high, the stems solitary, not clustered, and with- 
out a rootstock, but proceeding from a not at all deep-seated 
fascicle of fibrous roots: leaves scattered up and down the 
lower half of the stem (not clustered at base of a nearly 
