304 COVILLE 



or branch of the season half a centimeter to two 

 or three centimeters long. 



Leaves rhombic-obovate, narrowed toward the 

 base, broadest above the middle ; pedicel of the 

 ovary about three times the length of the nec- 

 tary ; capsule shining, not glaucous ; style almost 

 none, barely .25 mm. in length. 



S. ftiscescens^ p. 329. 

 Leaves oval to orbicular, sometimes obovate ; ped- 

 icel of the ovary little or not at all exceeding 

 the nectary ; style evident. 

 Capsule glaucous; style about .5 mm. long. 



5". ovalifolia^ p. 331. 

 Capsule not glaucous; style about 1.5 mm. long. 



S. stolo7iifera^ p. 333. 

 Plant an erect bush or tree. 



Plant a tree with oval leaves when fully developed 3 

 to 5 cm. wide, and devoid of stij^ules ; catkins 

 about i.^ cm. in diameter in flower and often 2 cm. 



in fruit 6". ampUfolia^ p. 314. 



Plant a shrub, commonly i to 2 meters high ; leaves 

 usually smaller, commonly oblong-lanceolate 

 (though sometimes as broad and large as the 

 last), and with ovate to lanceolate, glandular-den- 

 ticulate stipules. 

 Stems densely hirsute ; stipules usually persistent 

 for several years on the stout stems ; catkins ses- 

 sile on old wood, all leaves and green bracts ap- 

 pearing later and from separate buds. 



S. rickardsoni, p. 315. 

 Stems often smooth ; stipules seldom persistent on 

 old wood ; catkins on short leafy-bracted pe- 

 duncles appearing with the leaves. 

 Leaves crenate-serrate (the somewhat gland- 

 tipped teeth incurved), glaucous beneath, 

 though this character sometimes obscure in 

 young leaves ; catkin scales usually black. 



S. bar clay I ^ p. 316. 



Leaves finely glandular-denticulate (the teeth not 



incurved) throughout or only toward the base, or 



entire, not glaucous beneath, of nearly the same 



