486 CXXII.,. EUPHORBIACEE (BROWN). [ Euphorbia, 
spines or minute prickles at their 
base. 
Main spines not forked at the apex. 
Main spines opposite, 4-3 in. long; branches 
somewhat 4-angled . ° . 118. £. graciliramea. 
Main spines not opposite, in spiral series or 
irregularly scattered, 4-11 in. long on 
3-lobed shields. 
Spine-shields cierto 2-5 lin. below the 
soaps and narrowly linear; involucre 
13-2 lin. in diam. : . 119. BE. triaculeata. 
Spine-shields decurrent 1-13 — below the 
spines and oblong or linear-oblong invo- 
Jucre 14-13 lin. in diam. . . 120. E. monacantha. 
Main spines Sent y at the apex or below the middle. 
Shaft of main spines below the fork terete 
and solidly horny to the base; involucres 
sessile, where known. 
Shaft of main spines 3-10 lin. long; forks 
straight : : “ . 121. E. schizacantha. 
Shaft of main spines 2-3 lin, long; ‘forks oe 
recurved : . 122. EB. glochidiata. 
Shaft of main spines w itl h the ‘fleshy stem-teeth 
extending far up their compressed basal 
part. 
Forks of main spines shorter than the spines 
at the base of the stem-teeth; involucres 
in long-peduncled cymes. “ . 123. £. furcata. 
Forks of main spines longer than the s spines at 
the base of the stem-teeth; involucres 
sessile or subsessile . # . 124. EB. ubligianc. 
Branches up to 6 in. in diam., 8- Se fewer 2) 
angled ; spines in groups of 5 “ 4 on the 
sides and one inthe centre, scarcely + in. ase 
long; fragile and of no resistance” . . 167. E. abyssinica. 
Flowering branches 2-6 in. in diam., flat or 
3-8-angled, armed with pairs of spines 
(sometimes obsolete in 150, EL. quinquecostata ; 
168, E. controversa; and 169, E. Murielt) ; 
leaves usually rudimentary or scale- 
like, but in 160, HZ. Dawei; 173, E. similis ; 
174, E. tenebrosa; 177, E. neglecta; 178, E. 
Winkleri ; 179, E. obovalifolia ; and 189, EB. 
hermentiana, often developed and foliage- 
like, 4-5 in. long. 
*Spine-shields united into a continuous horny 
margin to the stem-angles. 
Spines 4-23 in, long, very stout; branches 
3-angled ‘ ‘ _ 157. EB. breviarticulata. 
Spines 3—# in. long, stout; branches 7-8- angled, ; 
Spirally twisted . ; . 147. E. Dinter. 
Spines ;4:-3 in. long; branches 3-5-angled or 
rarely flat, not spirally twisted. 
Flowering branches with very thin wing-like 
angles, about + lin, thick when dried. 
