20 
Stamen one. Connective of the anther large. Lacistemacear 
Stamens two or more. Connective inconspicuous. 
SCEPACEiE. 
17 . — Leaves with stipules. 19 
Leaves without stipules. 
Flowers imperfect, some staminate, some pistillate. 18 
Flowers perfect, having both stamens and pistils. 
Ovary three to six celled, many seeded. 
Aristolochiaceas. p. 282. 
Ovary one celled. 
Style one. Saktalaceaa p. 292. 
Styles three or more. Homaliaceje. 
18 . — Flowers not in aments. Datiscaceae. 
Flowers in aments. 
Leaves alternate. Myricaceje. 
Leaves opposite. 
Leaves simple. Garryacea;:. p. 167. t 
Leaves compound. Juglandaceas. p. 300. 
19. — Flowers imperfect, some staminate, some pistillate. 20 
Flowers perfect, having both stamens and pistils. 
Style one. Aristolochiace.e. p. 282. 
Styles three or more. Homaliaceas. 
20- — Fruit in a cup. Corylaceas. p. 302. f 
Fruit naked. 
Fruit simple. Begoniaceae. p. 161. 
Fruit consisting of many achenes partly immersed in a fleshy 
receptacle. Artocarpace^e. 
II, b. GYMNOSPERMS. 
Stem jointed. Gnetaceas. 
Stem not jointed. 
Leaves pinnate. Cycadace.e. p. 309. 
Leaves simple. 
