=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.=

2b. Shrub of bogs and shores, northern half of state
=Sweet Gale, Myrica gale.=

JUGLANDACEAE, the Walnut Family

Trees with alternate pinnately compound leave