Euphorbia. | CXXI, EUPHORBIACE® (BROWN). 
Spine-pairs with a pair of hard recurved 
hooks at their base. : - 161 
Spine-pairs without hooks or pr ickles at 
their base, spine-shields only occasionally 
united : és soz 
Flowering branches with the wing-like angles 
3 lin. or more thick when dried. 
Spine-pairs with a pair of very minute 
prickles or points at their base, some- 
times obsolete on the same stem, 
Stem-wings 1-1} in. broad, with grey 
horny margins. : - 163. 
Stem-wings 1-2} in. broad, with light 
brown horny margins : - 165. 
Spine-pairs without .a pair of minute 
prickles at their base. 
Branches constricted into conical-ovate 
segments; angles conspicuously in- 
dented at the flowering-eyes . = LOO: 
Branches with somewhat parallel-sided 
segments; angles not indented at the 
flowering eyes . 4 : a Ya 
**Spine-shiclds separate or only here and there 
united into a continuous horny margin to the 
stem-angles, but sometimes almost touching 
each other, 
Flowering branches flat and thin or sometimes 
3-angled ; calyx under the ovary with 3 lobes 
cut into filiform segments . - 160. 
Flowering branches 3-7- (usually 4- 2 angled. 
tFlowering-eyes quite separate from the spine- 
shields and not connected with them by 
a horny margin (see also 172, H. Rein- 
hardtit, and 175, £. confertiflora). 
Spine-pairs with or without small har- 
dened auricles but without a pair of 
minute prickles at their base; young 
growths with distinct foliage-leaves 
(always?), soon deciduous (see also 
190, £. conspicua, which may per- 
haps have flowering branches 2 in. in 
diam.). 
Flowering branches 3-angled; leaves 
petiolate. 
Leaves 1-1} in. long, revolute at the 
margins; involucre 34-4 lin. in 
diam. fe pen ASE 
Leaves mostly 2-5 ii in. long or some- 
times smaller, flat ; involucre 2} lin. 
17 
in diam. : : = 179. 
Flowering branches 4-5-angled ; leaves 
tapering from above the middle to 
2 sessile base. 
Leaves 14-3} in. long; spine-shields 
- E. angularis. 
LE. Nyike. 
E. mbaluensis. 
E. kibwezensis, 
EB. ussanguensis. 
E. intercedens, 
E. Dawei. 
E. Winkler. 
E. obovalifolia. 
and spines brown ; : . 177. E. neglecta. 
437 
