400 EUPHOKBIACE^. (SPURGE FAMILY,) 



Synopsis. 



§ 1. Ovules and seeds solitary in the cells. Flowers monoecious. 

 * Flowers without floral envelopes, enclosed in a common cup-shaped InTolucre. 



1. EUPHORBIA. Fertile flower solitary in the 4- B-toothed involucre. Sterile flowers eev- 



eral, each reduced to a single stamen. 



« * Flowers in hracted spikes or racemes ; the upper ones sterile, the lowest fertile* 



•4- Flowers apetalous. 



4-t- Stigmas and cells of the capsule 6-7* 



2. HIPPOMANK. Carpels woody, indehiscent. Spikes terminal. Staminate flowers clus 



tered. 



++ ^-»■ Stigmas and cells of the dehiscent capsule 3. 



3. STILLTNGIA. Calyx 2 - 3-toothed. Anthers erect. Staminate flowers clustered. 



4. £XC(ECARIA. Calyx 3-parted. Anthers pendulous. Staminate flowers single. 



5. ACALYPIIA. Stigmas many-parted. Flowers spiked. Bracts of the pistillate flowers 



leafy, toothed. 



6. TRAGIA. Stigmas 3, simple. Flowers racemed. Bracts small, entire. 



^- +■ Staminate flowers (except No. 1 in Croton), or the pistillate also furnished with petals. 



7. CROTON. Pistillate flowers apetalous, or with minute petals. Stamens 6 or more, distinct. 



8. CROTONOPSIS. Pistillate flowers apetalous. Capsule 1-celled. Stamens 5, distinct. 



9. APIIORA. Pistillate and staminate flowers 5-petalled. Capsule 3-celled* Stamens 10 



monadelphous. 



* * * Flowers cymose or panicled, apetalous. 



10. CNIDOSCOLUS. Flowers cymose. Calyx white, corolla-like. 



11. RICINUS. Flowers in crowded panicles. Calyx herbaceous. 



§ 2. Ovules, and commonly the seeds, 2 In the cells. 



# Flowers monoecious, apetalous. Ovary 3-celled. Herbs. 



12. PHYLLANTHUS. Flowers axillary. Calyx 6 - 6-parted. Stamens 3, monadelphous. 



13. PACHYSANDRA. Flowers spiked. Calyx 4-parted. Stamens 4, distinct. 



* « Flowers dioecious, apetalous. Ovary 2-celIed. Shrubs. 



14. DRYPETES. Flowers in axillary clusters. Fruit drupaceous, 1-celled, 1-seeded. 



1. EUPHORBIA, L. Spurge. 



Flowers monoecious, destitute of calyx and corolla ; the single pistillate, and 

 several monandrous staminate ones included in ^ cup-shaped or top-shaped 4-5- 

 toothed involucre, which has, commonly thick and often colored glands between 

 the teeth. Styles 3, 2-cleft. Capsule exserted, 3-ceUed : carpels 2-valved, 

 1-seeded. — A polymorphous genus of plants with acrid milky juice. 



§ 1 . Leaves without stipules. 



* Stem ei'ect, umhellately branched above : involucres solitary, terminal and in the 

 forks of the branches: leaves of the stem alternate, those oj the branches opposite or 

 whorled. 

 •t- Glands of the involucre 5, ivith white petal-like appendages : leaves entire * peren- 

 nials. 

 1. E. corollata, L. Stem smooth or pubescent; branches 4 -6, twice or 

 thrice forking, mostly short and fastigiate ; leaves thick, oblong or oval, obtuse, 

 pale and mostly hairy beneath ; involucres pedicelled ; appendages of the (green/ 



