(164) 
when young. Leaves obovate, thick, acutish, minutely 
glandular-denticulate, the upper surface slightly villous when 
young, soon glabrate and shining, the lower surface densely 
white-tomentose ; pistillate aments almost naked, from lateral 
buds, 4-5 cm. long, 1 cm. thick; bracts obovate, obtuse, 
about 3 mm. long, almost black, subsessile; ovary about 5 
mm. long, densely villous; style slender, over 2 mm. long, 
the divisions fully I mm. long. 
Perhaps nearest related to S. Sztchenszs, but readily dis- 
tinguished from that species by the much larger ovary, the 
long and slender style and stigmas and the broader and 
darker bracts. Mouth of the Klondike, May 30, 1899 
(Williams). 
Salix Alaxensts (Anders.) Coville. Lake Bennett (Tarle- 
ton). Determined by Mr. F. V. Coville. 
Salix Saskatchewana Seem.? Dawson (Williams). 
Salix Richardsont Hook. Lake Bennett (Tarleton). De- 
termined by Mr. F. V. Coville. 
Salix Seemannii Rydb. sp. nov. 
A shrub, 3-4 m. high, the bark of the older branches dark 
brown, that of the younger ones lighter, those of the season 
villous-pubescent. Leaves oval to oblong-lanceolate, acute 
at both ends, 3-7 cm. long, rather firm, entire; upper surface 
silky-villous when young, glabrate and bright green in age; 
lower surface permanently densely white or grayish silky- 
villous; aments on short lateral branches which bear 3-5 
small leaves, the pistillate ones 4-7 cm. long, rather loose; 
bracts oblong, obtuse, light brown, somewhat villous, about 
2mm. long; ovary in anthesis 3-4 mm. long, in fruit about 
8 mm. long, densely white-villous, subsessile; style o.5—-1 
mm. long; stigmas slender, about 1 mm. long, 2-cleft at the 
apex; staminate aments 2-3 cm. long; stamens 2; filaments 
slender, about 8 mm. long, free. 
Seemann’s specimens, cited below, were named by Hooker 
Salix glauca var. macrocarpa, but the plant is neither S. 
macrocarpa of Trautvetter, nor that of Nuttall; it is related 
to the former, but not to the latter. .S. macrocarpa Trautv. 
(S. glauca macrocarpa Ledeb.) is described as having sessile 
