218 EUPHOEBIACEAE. 



Stamens very numerous, the filaments re- 

 peatedly forked. 17. Rlcinus. 

 ft Lobes of the staminate calyx imbricated, or 

 calyx wanting. 

 Flowers in branched racemes. 18. Manihot. 

 Flowers spicate or in simple racemes. 

 Bracts small ; shrubs or trees. 



Calyx of the staminate flowers cleft 

 or lobed. 

 Filaments distinct. 19. Bonania. 



Filaments connate. 



Anthers 2 ; ovary 6-9-celled. 20. Hippomane. 

 Anthers 3 ; ovary 3-celled. 21. QrimmeocLendron. 



Calyx of the staminate flowers none 



or rudimentary. 22. Gymnanthes. 



Bracts large, membranous, at first enclos- 

 ing the infloTescence ; large tree. 23. Hura. 

 2. Flowers in a calciform or cyathiform involucre. 



Involucre calciform, the glands internal. 24. Pedttanthus. 



Involucre regular, the glands external. 



Glands of the involucre inframarginal ; shrubs or 



trees. 25. Adenorima. 



Glands of the Involucre marginal. 



Plants leafless or leaves small and rudimentary. 



Plants fleshy, cactus-like ; bractlets foliaceous. 26. EuphorJiia. 

 Plants woody, jointed; bractlets not folia- 

 ceous. 27. Arthrothamnus. 

 Plants normally leafy ; herbs, rarely shrubs or 

 trees. 

 Inflorescence terminal. 



Stem topped by an umbel ; stipules none. 28. Tlthymalus. 

 Stem not topped by an umbel ; stipules 



gland-like. 29. Poinsettia. 



Inflorescence axillary or axillary and terminal. 

 Leaves equilateral, ternate or verticillate ; 



shrubs or trees. 30. Aklema. 



Leaves inequilateral, opposite ; mostly 



herbs. 31. Cliamaesyce. 



1. SAVIA WiUd. Sp. PI. 4: 771. 1806. 



Trees or shrubs^ with alterna-te stipulate leaves, the inflorescence racemose 

 or short-cymose. Flowers petaliferous, dioecious or monoecious. Male flowers: 

 sepals 5, subequal, imbricated; petals smaU; stamens 5, alternate with the 

 petalsj filaments separate above their insertion; anthers erect; rudimentary 

 ovary slightly 3-fid. Calyx of the female flowers as in the male. 'Capsule 3- 

 eelled, the cocci 2-valved; seeds exarillate; endosperm fleshy; cotyledons plane. 

 [Commemorates Gattano Savi, professor at Pisa, died 1844.] About 6 West 

 Indian species. Type species: Croton sessiliflorum Sw. 



1. Savia baliam^nsis Britton, Torreya 4 : 104. 1904. 



A shrub or tree up to 5 m. high with ascending branches. Leaves oblong- 

 obovate, thick, obtuse and rounded at the apex, narrowed at the base, 7 cm. 

 long or less, 1.5-3 cm. wide, dark green, shining and strongly reticulated above, 

 pale green and inconspicuously reticulated beneath; petioles stout, about 4 mm. 

 long, about as long as the dense clusters of male flowers; fruit glabrous, 

 depi'essed-globose, slightly and obtusely 3-lobed, about 8 mm. in diameter. 



In thickets, from Abaco southward to Inagua : — Florida ; Cuba ; .Jamaica. Re- 

 corded by Mrs. Northrop as S. erytliroxyloides Grlseb., of Cuba, which it resembles. 



M.lIDEN-BfSri. 



2. SECTJBINEGA Comm.; Gmel. Syst. 1008. 1791. 



Shrubs, the leaves alternate, entire, often small, the flowers clustered or 

 solitary in the axils, monoecious or dioecious, apetalous. Male flowers: 



