KEY—-COMMON SEED PLANTS, FERNS, AND FERN ALLIES 13 
20. Leaves not compound. 21. 
21. Lower surface of leaves silvery. Russet buffaloberry (Shepherdia cana¬ 
densis) --(p. 90) 
21. Leaves green on both sides. 22. 
22. Corolla attached below the ovary. Dogwood ( Cornus) _(p. 95) 
22. Corolla attached above the ovary. Honeysuckle family-(p. 114) 
23. Flowers in catkins. 24. 
23. Flowers not in catkins. 25. 
24. Leaves toothed. Birch (Betula)-- __ (p. 47) 
24. Leaves entire. Willow (a Salix) _ __ (p. 46) 
25. Foliage with distinct odor of sage. Sagebrush ( Artemisia) -(p. 133) 
25. Foliage without odor of sage. 26. 
26. Stems spiny or prickly. 27. 
26. Stems not spiny or prickly. 29. 
27. Leaves entire, fleshy. Greasewood {Sarcobatus vermiculatus) _(p. 53) 
27. Leaves lobed, not fleshy. Gooseberry ( Grossularia) _(p. 72) 
27. Leaves compound, not fleshy. 28. 
28. Flowers white. Raspberry {Rubus) -(p. 74) 
28. Flowers rose color. Rose ( Rosa )„-(p. 77) 
29. Leaves compound. 30. 
29. Leaves not compound. 33. 
30. Leaflets 3. 31. 
30. Leaflets more than 3. 32. 
31. Leaflets up to 4 inches long. Wavy-toothed. Poisonous. Western poison- 
ivy ( Rhus rydbergii) _(p. 85) 
31. Leaflets smaller, with rounded teeth or lobes. Lemonade sumac ( Rhus trilo- 
bata )_ (p. 85) 
32. Flowers white. Greene mountain-ash {Sorbus scopulina) _(p. 78) 
32. Flowers yellow. Shrubby cinquefoil {Dasiophora fruticosa) _(p. 74) 
33. Leaves silvery-scaly. Silverberry {Eleagnus argentea).. _(p. 90) 
33. Leaves not silvery-scaly. 34. 
34. Flowers bright yellow. 35. 
34. Flowers rose color. Spiraea densiflora _(p. 74) 
34. Flowers white. 36. 
35. Leaves sticky. Macronema _ (p. 139) 
35. Leaves woolly. Tetradymia inermis _(p. 134) 
35. Leaves smooth or white-hairy. Rabbitbrush ( Chrysothamnus )_(p. 121) 
36. Stamens 5. 37. 
36. Stamens 8; fruit a berry. Western bog blueberry ( Vaccinium occiden¬ 
tal) _(p. 99) 
36. Stamens 8; fruit a dry capsule. Rusty menziesia {Menziesia ferruginea). (p. 97) 
36. Stamens 10. 39. 
36. Stamens more than 10. 41. 
37. Petals united. Prickly gilia {Gilia pungens) _(p. 103) 
37. Petals distinct. 38. 
38. Leaves entire. Snowbrush {Ceanothus velutinus) _(p. 85) 
38. Leaves lobed. Currant {Ribes) _(p. 72) 
39. Petals distinct. Smooth Labrador-tea {Ledum glandulosum) _(p. 97) 
39. Petals united. 40. 
40. Berries red. Grouse whortleberry {Vaccinium scoparium) _(p. 98) 
40. Berries black. Big whortleberry {Vaccinium membranaceum) _(p. 98) 
41. Leaves 3-lobed. Mallow ninebark {Physocarpus malvaceus) _(p. 74) 
41. Leaves 5-lobed. Whiteflowering raspberry {Rubus parviflorus) _ - (p. 74) 
785717°—48-2 
