400 EUPHORBIACE.K. (SPURGE FAMILY.) 



Synopsis. 



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

 » Flowers without floral envelopes, enclosed In .-i common cup-shaped involucre. 



I. EUPHORBIA. Fertile flower solitary in the 4- 6-toothed involucre. Sterile, flowers sev- 



eral, each reduced to a Bingle stamen. 



• * Flowers in bracted spikes or racemes ; the upper ones sterile, the lowest fertile, 

 t- Flowers apetalous. 

 ++ Stigmas and cells of the capsule 6-7. 

 J. HIPPOMANE. Carpels woody, indehiscent. Spikes terminal. S laminate flowers clus- 

 tered. 



« <+ Stigmas and cells of the dehiscent capsule 3. 



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



1. EXCCECARIA. Calyx 3-parted. Anthers pendulous. Staminate flowers single. 



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



leafj , toothed. 

 C. TKAGIA. Stigmas 3, simple. Flowers racemed. Bracts small, entire. 

 i- t- Staminate flowers (except No. 1 in Croton), or the pistillate also furnished with petals. 

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

 s. CKOTONOPSIS. Pistillate flowers apetalous. Capsule 1-celled. Stamens 5, distinct. 

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



uiouadelphous. 



* » # Flowers cymose or panicled, apetalous. 



1 i. CNTDOSCOLUS. Flowers cymose. Calyx white, corolla-like. 



11. EIC1NUS. Flowers in crowded panicles. Calyx herbaceous. 



J 2. Ovules, and commonly the seeds, 2 iu the cells. 

 » Flowers monoecious, apetalous. Ovary 3-cclled. Herbs. 



12. PHYLT.ANTIIUS. Flowers axillary. Calyx 5 - 6-partcd. Stamens 3. monadelphous. 



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



* » Flowers dioecious, apetalous. Ovary 2 -celled. Shrubs. 



II. DRTPBTES. Flowers in axillary clusters. Fruit drupaceous, 1 celled, 1-seeded. 



1. EUPHORBIA, L. Si-urge. 



Flowers monoecious, destitute of calyx ami corolla; the sino-le pistillate, and 

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

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

 the teeth. Styles •">, 2-cleft. Capsule exserted, 3-celled: carpels 2-valved, 

 i ded. — A polymorphous genus of plants with acrid milky juice. 



§ l. Leans without stipules. 

 i umbellately branched above: involucres solitary, terminal and in the 

 of the branches: leaves <>/th<' stem alternate , those oj the branches opposite or 

 whorled. 

 i, andt <•( ili' involucre 5, with whitt petal-like appendages : leaves entire: peren> 



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

 thrice forking, mosti] short and fastigiate; leaves thick, oblong or oval, obtuBe, 

 pale and mostly balry beneath ; involucres pedicelled , appendages of the (gr» a) 



