KEY TO FAMILIES 



[The figures refer to the number of the Family.] 



A. Perianth wanting, or of a single series, the calyx. 



Flowers 2-sexual 39. Crudia, Prior ia. 



Flowers 1-sexual. 



Ovary usually 3-celled 51. Euphorbiaceas. 



Ovary 4-celled Callitrichacese. 



B. Perianth of a double series sepals and petals. 



Flowers unisexual. 

 Leaves simple. 



Ovary of four carpels cohering only at the apex... 46. Castela. 



Ovary 2-3-celled 51 . Euphorbiaceas. 



Leaves pinnate. 



Styles sublateral 45. Zanthoxylum. 



Styles terminal 46. Simarubacese. 



Flowers polygamous. 



Carpel one. Fruit a pod (sometimes not opening) 39. Leguminosu'. 

 Carpels more or less free, quite free in fruit. 



Styles sublateral 45. Zanthoxylum. 



Styles terminal 46. Picrxna. 



Carpels united into a single ovary. 



Ovary 1-celled 45. Amyris. 



Ovary 3-5-celled. 



Trunk unbranched. Stamens as many as 



petals 45. Spatlidia. 



Trunk branched. Stamens twice as many 



as petals 47. Burscracess. 



Flowers 2-sexual. 



Leaves simple or 1-foliolate. 

 Leaves alternate. 



Fruit a pod (sometimes not opening, rarely 



drupe-like) 39. Legum'inosse. 



Fruit samaroid 50. Securidaca. 



Fruit a capsule. 



Flowers regular 42. Linum . 



Flowers irregular 50. Poly gala. 



Fruit a drupe 43. Erythroxylon. 



Fruit baccate 45. Rutacex. 



Ripe carpels 3-5, surrounded by the calyx 46. Suriana. 



Leaves opposite. 



Leaves gland-dotted 45. Ravcnia. 



Leaves not glandular. 



Leaves palmately lobed 40. Geranium. 



Leaves entire, very rarely toothed 49. Ma Ipigliiaccx. 



