KEY 



Flowers not in catkins j calyx present, sometimes petal-like. 

 Trees or shrubs. 

 Flowers not hypogynous ; plants not climbing . . 73. Dogwood , . . 162 

 Flowers not hypogynous ; climbing plants . . . 24. Dutchman's Pipe 64 

 Flowers hypogynous. 



Style single, not clef t, fruit a key. (^axinus) . 78. Olive 175 



Style single, not cleft, fruit a stone-fruit .... 37. Laurel 88 



Styles 2 or 2-oleft, fruit 1-celled 19. Elm 59 



Styles 2 or 2-oleft, fruit Z-celled 58. Maple 140 



Styles 3, each 2-cleft. Ovary 3-celled 53. Spurge . . . 135 



Herbs. 

 Flowers not hypogynous ; ovary 6-oelled . . . . . 24. Dutchman's Pipe 64 

 Flowers not hypogynous ; ovary 1-celled ; flowers in 



umbel-like clusters 28. Sandalwood . . 64 



Flowers hypogynous ; ovary 1-oelled. 



Stamens many 32. Buttercup ... 77 



Stamens few. 



Stipules sheathing the joints 25. Buckwheat ... 66 



Stipules wanting. 



Bather fleshy herbs 26. Goosefoot ... 68 



Not fleshy. 

 Ovules on a free central placenta ; delicate, 



soft-leaved herbs. (Stellaria) .... 80. Pink 71 



Ovule single. Tough, with awl-shaped leaves. 



(Sclercmthus) 30. Pink 71 



Ovary several-celled. 

 Small prostrate herb ; leaves spatulate, whorled . 28. Ice-plant .... 69 

 Stipules present, not sheathing. 



Style single 21. Nettle ... .62 



Styles 2 20. Mulberry ... 61 



Flowers hypogynous, ovary 3-celled ... .53. Spurge .... 135 



Flowers hypogynous, ovary 5-10-celled; fruit a berry 27. Pokeweed ... 69 



II. PolypetalOUS Division. Calyx and coroUa both present, the petals i.ot united. 



A. 

 Stamens more than 10. 



Trees, shrubs, or woody vines. Leaves alternate. 

 Ovary 1, simple. 

 Fruit a stone-fruit 45. Rose 105 



