110 PITTONIA. 
in diameter, from round-obovoid to almost orbieular, lightly 
but rather evenly crenate: flowering stems slender, decum- 
bent at base, 4 to 6 inches high, commonly monocephalous, 
rarely with 2 heads; cauline bracts very variable, a few ob- 
lanceolate, some subulate-lanceolate, others somewhat ly- 
rate: involuere subcampanulate, 3 or 4 lines high and of 
nearly the same breadth, of numerous broad thin bracts 
and one or more rather broad and herbaceous bractlets at 
base: rays 10 or more, broad and short, golden-yellow. 
This is Mr. J. B. Leiberg's n. 1376 as seen in the U.S. 
Herbarium, collected in 1895 in the Cœur d'Alene Moun- 
tains, Idaho. The sheet is labeled S. petrus; but the plant 
is extremely unlike that species, and very much resembles 
in its rootstocks and pale thin foliage what some small 
valerian might be. 
S. ovinus. Densely tufted rootstocks stout, the whole 
plant dwarf, the leaves only 1 inch high inclusive of the 
petiole, the monocephalous scapiform stem not more than 
2 inches: leaves thickish and subsucculent, variable in 
outline, from suborbicular and distinctly petiolate to sub- 
spatulate, none more than 4 inch in diameter, all coarsely 
dentate, the petioles flocculent, at least when young: head 
subcampanulate, 3 inch high and about as broad exclusive 
of the 12 to 15 rather long and showy yellow rays: bracts 
of the involucre lanceolate, but tapering abruptly and some- 
what acuminately from near the middle. 
Collected on Sheep Mountain, Alberta, Canada, in J uly of 
1895, by Mr. John Macoun, the specimens bearing the num- 
ber 11,619 of the Canadian Survey Herbarium. 
S. CANDIDISSIMUS. Allied to S. wernerixfolius, rather 
larger, the rootstocks subligneous and more enduring, the 
leaves broader and more conspicuously petiolate, both their 
faces very white with a thick dense permanent tomentum: 
leaves oblanceolate, obtuse, mostly entire, some with a few 
