salix britensis

Scarlet Willow. A spreading tree with orange-scarlet branches in winter. Produces yellow or yellow-green catkins in spring, with the leaves. 

salix lanata

Woolly Willow. A compact rounded shrub with dull, dark green leaves covered with silvery grey wool. Produces golden yellow or grey-yellow catkins in late spring, with the leaves. 

Black Pussy Willow

Black Pussy Willow. An upright shrub with grey-green leaves turning glossy green. Produces attractive black catkins with brick-red anthers in spring, before the leaves. 

salix tortuosa

Corkscrew Willow. An upright tree with twisted branches and twisted bright green leaves. Produces yellow-green catkins in spring.