KEY TO THE FAMILIES 39 
7. Ovary more than 1-celled. 
8. Flowers unisexual...........0........ 75. Euphorbiaceae (p. 279) 
8. Flowers perfect. 
9. Styles free, very numerous; leaves entire. 
54. Anonaceae (p. 205) 
(Anona) 
9. Styles free, about 10, radiate; leaves toothed. 
87. Dilleniaceae (p. 331) 
(Dillenia) 
9. Styles simple or entirely united. 
10. Ovary raised on a stalk; woody, usually spiny vines 
OF -ShTUDS: aii! 59. Capparidaceae (p. 214) 
(Capparis) 
10. Ovary not raised on a stalk. 
11. Leaves not glandular-dotted, not jointed to the 
215 Cc) |; es aa a 83. Tiliaceae (p. 312) 
- 11. Leaves glandular-dotted, jointed to the winged 
1 CC: Nae ey 69. Rutaceae (p. 268) 
(Citrus) 
5. Leaves opposite; sepals connate into a tube, the lobes valvate. 
97. Lythraceae (p. 340) 
3. Stamens few, never more than twice as many as the petals. 
4. Leaves simple. 
5. Tendril-bearing vines. 
6. Flowers small to large, perfect, mostly solitary; ovary 1- 
celled, many ovuled........................ 93. Passifloraceae (p. 335) 
6. Flowers small, often uinsexual, numerous; ovary several- 
celled, the ovules few.......00..0...20000.20.- 82. Vitaceae (p. 309) 
5. Shrubs, trees, or woody vines, without tendrils. 
6, Leaves opposite. 
7. Erect shrubs; stamens 10........ 73. Malpighiaceae (p. 277) 
7. Woody vines; stamens 5 or less, on the prominent disk. 
78. Hippocrateaceae (p. 302) 
7. Shrubs or low herbs; stamens 8...... 97. Lythraceae (p. 340) 
6. Leaves alternate. 
7. Stamens as many as the petals. 
8. Stamens 3, alternating with cleft staminodes; woody 
Waima 3 5 eee Se) eee Se 40. Olacaceae (p. 185) 
8. Stamens 4 to 6. 
9. Stamens united in a tube........ 86. Sterculiaceae (p. 326) 
(Melochia) 
9. Stamens free. 
10. Stamens opposite the petals. 
11. Flowers perfect.............. 81. Rhamnoceae (p. 307) 
11. Flowers unisexual. 
52. Menispermaceae (p. 203) 
10. Stamens alternate with the petals. 
11. Ovary 1-celled; ovules many. 
62. Pittosporaceae (p. 219) 
11. Ovary several-celled; ovules 1 or 2 in each cell. 
12. Flowers unisexual. 
75. Euphorbiaceae (p. 279) 
12. Flowers perfect........ 77. Celastraceae (p. 301) 
