SALICACEA# 131 
ovary covered with white tomentum ; alpine pastures. S. 
phylicifolia, L. (including Wezgelzana, Willd.) ; similar, 
but catkins thick, dense, sessile; Tirol. S. Myrsinites, 
L. (including ovata, Ser., and /acquinzana, Willd.); stem 
prostrate, leaves green and shining on both sides, catkins 
on long stalks, ovary at first woolly; alpine pastures, 
frequent. S. daphnoides, Vill. ; catkins appearing before 
the leaves, branches glaucous-blue; sub-alpine. S. Lap- 
ponum, L. (helvetica, Vill.); leaves elliptic-lanceolate, 
densely white-tomentose beneath, stipules half-cordate, 
catkins sessile; high, moist, frequent. S. glauca, L.; 
leaves narrowly lanceolate, silky on both sides, after- 
wards glabrous, stipules ovate, acute, catkins on long 
stalks; alpine pastures ; Switzerland, Tirol. 
C. Catkins terminal, at the apex of shoots of the same 
year; low shrubs:—S. retzculata, L. (Pl. 106); leaves 
large, elliptic, entire, with prominent nerves and white 
tomentum beneath, catkins silky, on long stalks; high, 
frequent. S. vestzfa, Pursh.; resembling the last, but 
leaves more woolly, catkins on short stalks, tomentose ; 
Salzburg, rare. S. herbacea, L.; stem prostrate, leaves 
very small, nearly orbicular, crenate-serrate; very high ; 
Switzerland, Dauphiny, Pyrenees. S. retusa, L. (including 
Kiutatbeliana, Willd.); leaves obovate, entire, truncate, 
with parallel nerves; high, frequent. S. serpyllzfolza, 
Koch; leaves smaller, acuminate, catkins very few- 
flowered, stems interwoven ; high, frequent. 
The lowland Swiss species may be arranged under the 
following groups :—.S. ¢vzandra, L.; stamens 3. S. pen- 
tandra, L.; stamens usually 5. S. fragzlis, L., Withy; 
leaves lanceolate-acuminate, stipules half-cordate, deci- 
duous. S. alba, L., White Willow ; leaves narrowly lan- 
