8a. Trees --9. 8b. Shrubs --13. 9a. Petioles without glands --10. 9b. Petioles with glands --11. 10a. Petiole short (about 5 mm.), broad and flat =Black Willow, Salix nigra.= 10b. Petiole slender, about 10-20 mm. long =Peach-leaved Willow, Salix amygdaloides.= 11a. Leaves green beneath =Crack Willow, Salix fragilis.= 11b. Leaves pale beneath --12. 12a. Branches and twigs conspicuously drooping =Weeping Willow, Salix babylonica.= 12b. Branches and twigs not conspicuously drooping, yellow =Yellow Willow, Salix alba var. vitellina.= 13a. Shrubs of bogs --14. 13b. Plants of sand-dunes along the Great Lakes --15. 13c. Plants of dry upland hills --16. 13d. Plants of wet ground, river-banks, and swamps --17. 14a. Leaves densely white-tomentose beneath =Willow, Salix candida.= 14b. Leaves pale beneath but not tomentose =Willow, Salix serissima.= 14c. Leaves glabrous and green beneath =Willow, Salix pedicellaris.= 15a. Leaves linear =Willow, Salix longifolia.= 15b. Leaves ovate-lanceolate, tomentose beneath =Willow, Salix syrticola.= 15c. Leaves ovate-lanceolate, glabrous =Willow, Salix glaucophylla.= 16a. Leaves about 3 times as long as broad =Willow, Salix rostrata.= 16b. Leaves narrower, nearly sessile =Willow, Salix tristis.= 16c. Leaves narrower, distinctly petioled =Willow, Salix humilis.= 17a. Leaves linear or nearly so =Willow, Salix longifolia.= 17b. Leaves shining =Willow, Salix lucida.= 17c. Leaves silky =Willow, Salix sericea.= 17d. Leaves not as in the preceding 3 species --18. 18a. Leaves rounded at base =Willow, Salix cordata.= 18b. Leaves acute at base --19. 19a. Leaves finely serrulate =Willow, Salix petiolaris.= 19b. Leaves remotely serrate or nearly entire =Willow, Salix discolor.= MYRICACEAE, the Sweet Gale Family Shrubs, with monoecious or dioecious flowers in catkins, and aromatic foliage. 1a. Leaves pinnately lobed =Sweet Fern, Myrica asplenifolia.= 1b. Leaves merely serrate --2. 2a. Shrub of sandy soil, shore of Lake Erie =Bayberry, Myrica carolinensis.=