478 CXXII, EUPHORBIACEE (BROWN). | Euphorbia. 
Stem and branches terete or slightly angular, 
but without wing-like angles. 
Ovary densely and conspicuously tubercu- 
late, glabrous ; leaves very variable . 70. EF. depauperata. 
Ovary not tuberculate or in 62, JZ. 
ugandensis, with a few inconspicuous 
tubercles, glabrous to tomentose. 
tinvolucres solitary, terminal or in the 
forks of the branches or beth, 
sometimes forming terminal 2—3- 
flowered cymes, or scattered along 
one side of long flowering branches, 
in 37, EB. claytonioides, somewhat 
congested on the short ultimate 
divisions of the repeatedly forked 
branches, never in umbels or heads. 
Plant 3-15 in. high. 
Jxeaves opposite or only those 
alternate that are on the main 
stem below its point of 
branching. 
Leaves very shortly but distinctly 
petiolate, linear; ovary and 
capsule sprinkled with minute 
adpressed hairs. 33. E. glaucella. 
Leaves sessile, linear Mitton te 
linear-lanceolate ; ovary and 
capsule glabrous. 
Flowers in the forks of the 
branches or axillary; in- : 
volucre-glands 2-horned . 34. 2B. dracunculoides. 
Flowers at the ends of elon- 
gated slender branches ; in- 
volucre-glands not 2-horned 36. H, macra. 
Leaves sessile, broadly reniform- 
ovate ; involucre scarcely 1 lin. 
in diam. : 37. B. claytonioides. 
Leaves alternate or those at the 
flowering nodes opposite. 
Involucre subsessile or on ped- 
uncles 1—2 lin. long; leaves 
linear, 
Leaves 3-13 in. long; in- : 
volucre minutely puberulous 45. 2. bongensis. 
Leaves 2-54 in. long; in- 
volucre glabrous : 46, £. calva. 
Involucres on peduncles 3-12 lin, 
long, and together with the 
ovary more or less tomen- 
tose. 
Involucre-glands not tuber- 
culate on the inner or upper i 
surface. : ‘ . 47. EB, Oatesi. 
Involucre-glands tuberculate oe 
on the upper or inner surface 48. 2. Verdickii 
