488 cxxii. EUPHORBiACE^ (brown). [Euphorbia, 



Leaves ^-l^ in. long; spine-shields 

 and spines blackish. 

 Young stem-angles at the flowering- 

 eyes not more than 1^ lin. thick 

 and their sides with faintly promi- 

 nent oblique ribs extending to the 

 spine-shields .... 173. E. similis. 

 Young stem-angles :it the flowering- 

 eyes 2-3 lin. tliick and their 

 Bides with very prominent oblique 

 ribs extending to the spine- 

 shields 174. E. tenehrosa. 



Spino-p;iirs with a pair of minute prickles 

 at their base ; leaves rudimentary, scale- 

 like; ovary with a many-lobed calyx at 



its base 164. E . kamerunxea . 



ffFloweiintr-cyes touching, merging into or in- 

 cluded in the spine-shields (not described 

 in \12,E. Reinhardtii, and 175, E. con- 

 fer tijlora). 

 Flowering brandies with very thin wing- 

 like Jingles about \ lin. tliick when 



dried \Q>2. E. Nyikce. 



Flowering branches' with angles at least 



^ lin. thick (usually much more) in 



dried specimens. 



Flowers unknown; living branches 3-6 



in. in diam., usually 6- (sometimes 5-) 



angled, constricted into conical or 



elliptic segments .... 170. E. grandis. 



Cymes sessile, subsessile or with 



peduncU-s not more than \ in. long 



(see also 182, E. Erythr<j^ck,oi which 



the flowers are unknown, but from 



analogy jjrobably pedunculate). 



Flowering branches constricted into 



elliptic, lanceolate or orbicular 



segments 1^-5 in. long ; calyx under 



the ovary with 3 (or perhaps more) 



linear lobes 1-1^ lin. long . . 168. E. controversa. 



Flowering branches constricted (of ten 

 slightly) into parallel-sided or 

 slightly conical segments 6-15 in. 

 long; calyx under the ovary 

 (where known) minutely 4- 

 tootlied. 

 A bush up to 3 ft. high; spine-pairs 



about 5 lin. ai>art . . . 175. E. confertijiora. 



Arborescent, 15-30 ft. high; spine- 

 pairs 8-12 lin. apart . . . 176. .B. disclusa. 

 Cymes (where known) on i)eduncles 

 -/;-g in. long; calyx under the 

 ovai-y (where known) divided into 

 5-9 lineal- or filiform segments 

 §-2^ lin. long. 



