300 EUPHOEBiACE^. [EuphorbiacetB. 



Teibe 2. Crotonese. — Male and female flowers wHUn separate bracts in the same spi&e, 

 or in different spikes or plants, mostly with a perianth. Ovary-cells 1-ovulate. 

 Perianth calyx-like. Petals none. 

 Stamens 2 to 10, or rarely more. 



Stamens 2 or 3. Anthers didymous. Styles simple. Spikes 



eatkin-like ■ ^- Stillingia. 



Stamens about 10. Anthers vermicular. Male spikes catkin-like. 



Females in leafy bracts. Styles finely divided 3. Aoalypha. 



Stamens 4 to 10. Anthers didymous. Styles plumose. Spikes 



panicled . 4. Mappa. 



Stamens on a central column. Anthers didymous. Stigma 



sessile, disk-shaped. Spikes or racemes simple .... 5. Endospeemum. 

 Stamens 8, in a ring. Styles long, subulate. Mowers racemose 6. Stipellakia. 

 Stamens indefinite. 



Anther-cells distinct, erect from the base. Glands alternating 



with the female perianth-lobes, leaves alternate ... 7. Cla^oxylon. 

 Anther-ceUs distinct, collaterally attached. No glands within 

 the perianth. Fruit usually echinate. 

 Filaments simple. 

 Leaves mostly opposite, or racemes and branches leaf- 

 opposed , 8. Hancea. 



Leaves alternate 9. Bottlera. 



Filaments branched 10. RiciNUS. 



Petals within the calyx, at least in the male flower. Styles forked 

 or dichotomous 



Stamens indefinite. Flowers racemose 11. Croton. 



Stamens 8 or 10. Flowers corymbose 12. Jatkopha. 



Tbibe 3. Phyllantheee. — Male and female flowers separate. Ovary-cells 2-ovulale. 

 Flowers monoecious (or rarely dioecious), in axillary clusters. 

 Leaves on short petioles. 

 Leaves alternate, usually distichous. Styles united or approximate 

 at the base. 



Calyx 5-lobed, valvate. Petals 6 13. Briedelia. 



Perianth-segments 4 to 6, imbricate, in 1 or 2 rows. 

 Disk entire, or of distinct glands, at least in the males. 

 Perianth-segments 6, rarely 5. Stamens 3 or 2. Capsule 



dehiscent, usually 3-celled 14. Phyllanthus. 



Perianth-segments 4 or 5. Stamens usually 5. Fruit 



baccate, 2- to 5-celled 15. CicoA. 



No prominent disk or gland within the perianth. 



Perianth turbinate or campanulate at the base. Lobes 6, 



inflected in the males, spreading in the females . . .16. Melanthesa. 

 Perianth-segments 6. Stamens 3 to 10. Styles short, 



thick, and ereet 17. Gloohidion. 



Leaves opposite. Styles distant at the base 18. Bnxus. 



Flowers dioecious, in panicles, racemes, or spikes. 



Flowers all in lateral panicles or racemes. Petioles long. 



Leaves compound. Ovary 3-celled 19. BiscHorFiA. 



Leaves simple. Ovary 2-celled. Berry 1 -seeded . . . . 20. Daphniphyllum. 

 Male flowers in catkins, females in racemes, spikes, or clusters. 



Ovary 2-ceUed. Styles or stigmas 2 .21. Aporosa. 



Ovary 1-celled. Styles or stigmas 3 or 4 22. Antidesma. 



1. EUPHORBIA, Linn. 



Flower-heads resembling single flowers. Involucre calyx-like, cup-shaped, 

 with 4 or 5 minute teeth, alternating with as many horizontal glands, whicli 



