49. Calyx irregular, five parted, commonly enlarged in fruit. Juice 



resinous. Trees of tropical Asia. DIPTEROCABPACB^. 

 Calyx regular, not enlarged in fruit. Juice not resinous. 



Stamens distinct. 49, b. 

 Stamens partly or wholly united. 



Anthers one celled. Leaves simple. Shrubs or herbs, seldom 



trees. MALVACK.T-:. p. 70. 

 Anthers two celled. Tropical trees or shrubs ; very rarely herbs. 



Stamens arranged in a column, all perfect. Calyx twisted or im- 

 bricate in the bud. Fruit woolly or hairy within. 



STERCULIACK.*:. p. 75. 

 Stamens rarely all anther bearing. Calyx valvate in the bud. 



BYTTNERIACE.K. 



49, b. Anthers opening lengthwise. TILIACEJK. p. 75. 



Anthers opening at the end. Petals fringed. EL.HOCARPACE/F,. 



50. Anther valves rolling upwards. BERBERIDACE.E. p. 44. 

 Anthers opening lengthwise. 



Leaves with stipules. 62 

 Leaves without stipules. 



Carpels more than one, combined into a single ovary. 52 

 Carpels distinct or solitary. 



Flowers all perfect. 51 



Flowers regular, some staminate, some pistillate, some perfect. 

 Ovules mostly two or four in each ovary. Leaves commonly 

 with translucent dots. Trees or shrubs. XANTHOXYLACE.E. p. 82. 



Flowers all imperfect. 



Leaves compound. Ovules numerous. Embryo minute. Albumen 



of seeds copious. LARDIZABALACE.K. 

 Leaves simple, entire. One ovule in each ovary. Embryo large. 



Albumen of seeds scanty. MENISPERMACE.E. p. 44. 



