182 KEY TO SUB-CLASSES, ORDERS AND GENERA. 
CII—EUPHORBIACEA—cont. 
(*) Styles short bifid ; flowers in racemes or panicles :— 
(+) Anthers 3, sessile on a cylindric column :— 
decexxxvi—Trigonosteaon. 
(++) Stamens 8—35 :— ... ; deccexxxvili—O stodes. 
(#*) Styles slender recurved, entire :— ... ... decexxxvii— Codizum. 
(b) Female sepals as arule enlarged in fruit :-—- .. dccexxxix—Biachia. 
(C) Male calyx open in bud, female sepals enlarged in fruit; petals 
present in both male and female :— ... decexli—Dimorphocalyx. 
(D) Male sepals valyate ; anther cells distinct, pendulous, glabrous:— 
decexlii--Agrostistachys. 
(3) Petals none :— 
(A) Calyx campanulate or cup-shaped :—- 
(a) Flowers moncecious ; calyx campanulate ; juice white milky, 
producing caoutchoue :-- 
(a) Stamens 10, filaments free :—- ... ae decexxxi—Manihot. 
(8) Stamens 5--10, adnate to a central column :— <dcccxxvili—Hevea. 
(b) Flowers dicecious ; calyx of both male and female cup-shaped ; 
flowers of male in stalked catkin-like heads, with stamens on 
the concave face of 1 or more rows of scales inserted around a 
central column ; of females solitary, stalked, in the axils of 
leaves, with a rounded ovary terminating in a very long style 
which is trumpet-shapea and has a_ reflexed many-toothed 
border :—-... ‘oe Mis ae se pe ... decelxi—Hura 
(B) Sepals of male imbricate :— 
(a) Flowers of male fascicled ; fruit smooth (not echinate), tardily 
dehiscent ; leaves penninerved, stzpules sheathing ; resinous 
trees :— ee ee “or Fic noe ... decely—Gelonium. 
(b} Flowers of male in panicles or racemes ; leaves 3—5 costate :— 
decelvi-—Baliospermum. 
(C) Sepals or calyx segments of male valvate ; trees or shrubs :— 
(a) Filaments free (or united only at the very base) :—- 
(a) Stamens 2--8 ; flowers in androgynous or 1-sexual spikes ; 
juice white, milky, acrid :-— 
(*) Calyx of male 2—3-lobed:— __... BAA ... dccclix—-Sapium. 
(**) Sepals of male free, 3,small:— ... Gccclx—Excecaria. 
(8) Stamens 4, anthers 2-celled :— 
(*) Filaments slender, anther cells parallel, adnate to the thick - 
connective:--__.... An ey ... deecxlv—Adenochlena. 
(**) Filaments short, flat, anther cells divaricate :— 
decexlvi-——Ccelodepas, 
(7) Stamens 6 to many, anthers 2-celled :— 
- (*) Leaves always alternate :—~ 
(+) Anther cells divaricate ~~ 
(§) Styles short entire, densely plumose :—— 
decexliii—Claoxylon. 
(§§) Styles filiform with numerous slender branches :— 
dceexliv—Acaly pha. 
(++) Anther cells contiguous and parallel :— 
decexlvii—A Ichornea. 
(**) Leaves alternate or opposite; anther cells globose or 
shortly-oblong, widely separated by a thick connective :— 
deccl—Mallotus, 
(***) Leaves opposite ; anther cells contiguous and parallel :— 
(+) Leaves entire; fruit a drupe:— ... .. decexlviii—Trewia. 
(tt) Leaves dentate or sinuately lobed ; fruit a capsule :— 
; deccxlix—Ccelodiscus. 
(5) Stamens 1 to many, anthers 4-celled :— 
(*) Styles with 2—8 long filiform arms ; leaves not peltate, but 
_ penninerved : 2 ASS ny fi deccli—Cleidion. 
(**) Styles entire ; leaves peltate, 3—5-costate : — 
decclii— Macaranga. 
