qi : 
& Catkins commonly 2-4 om. long; capsules subsessile; 
/O twigs wooly; stamens 2 
8 Leaves (except of suckers or young shoots) pre- 
/2 vailingly glabrous on the upper surface /6, Se exigua 
® Leaves silkyesilvery on both surfaces /7, Se argophylle 
Leaves prevailingly 1-4 cm. wide 
bs pices oie with a pair of wart-like glands 
/® at the base of the blade; stamens 5; capsule glabrous, Se lasiandra 
——— 
( Petioles eglandular; stamens 2 or l. 
& Upper surface of leaves green and glabrous, the 
j 
; 
ati covered with a close satiny pubescence; 
twigs glabrous; capsules silvery pubescent 
/o Styles .7-1.5 mm. long; stamens 2 /y, Se drummondiana 
= 
iQ Styles .5-.7 mm. long; stamen 1 /7. Se sitchensis 
8 Upper surface of leaves green and glabrous or 
pubescent, the lower more or less wooly, not 
A 
12, satiny; twigs mostly pubescdnt (except Ss. 
melanopsis) 
/f)) Pistils and capsules glabrous, stamens 2 
|Z Leaves prevailingly glabrous on the upper 
/t, surface 
/4 Branchlets glabrous ¢. S-« melanopsis 
/“{ Branchlets mostly pubescent 20. Se lasiolepis 
pias d on both surfaces (Glabeeet-oceovesy Se comnutata 
glabrate in vgre den cond date) —asmresedeanlonty |. 
lo ei ae capsules wooly or silvery pubescent 
é 
/*%2, Stamen 1; leaves oblong, thickish, glabrous 
a 
/q above, dull silver beneath, not satiny 21 Se Coulteri 
19 Stamens 2 
Pe 
i a NAN NA, insti atl 
