A Betula glandulosa habit, Saarela et al. 2027 B Salix arctophila habit, Saarela et al. 2325 C Salix calcicola staminate catkin (left), Saarela et al. 2247, pistillate catkin (right), Saarela et al. 2236 D Salix calcicola habit, Saarela et al. 2247 E Salix herbacea pistillate catkin (left), Saarela et al. 2164, staminate catkin (right), Saarela et al. 2165 F Salix herbacea habit, Saarela et al. 2164 G Salix uva-ursi habit and pistillate catkins, Saarela et al. 2699 H Salix glauca var. cordifolia pistillate catkins (left) and habit (right), Saarela et al. 1943. Photos A, B by P.C. Sokoloff and C–H by R.D. Bull.