486 cxxii. EUPHORBiACE-E (browx). [Euplwrbia. 



spines or minute prickles at their 

 base. 



Main spines not forked at the apex. 



Main spines opposite, ^-f in. long; branches 



somewhat 4i-angled . . . . .118. E. graciliramea. 



Main spines not opposite, in spiral series or 

 irregularly scattered, ^1\, in. long on 

 3-lobed shields. 

 Spine-shields decurrent 2-5 lin. below the 

 spines and narrowly linear; involucre 

 1|— 2 lin. in diam. . . . . 119, i7. triaeuleaia. 



Spine-shields decurrent 1-li lin. below the 

 spines and oblong or linear-oblong ; invo- 

 lucre 1^-lf lin. in diam. . . . 120. E. tnonacantha. 

 Main spines forked 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 



recurved ...... 122. E. glocJddiata. 



Shaft of main spines with 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. E.fvrcaia 



Forks of main spines longer than the spines at 

 the base of the stem-teeth ; involucres 

 sessile or subsessile . .... 124. E. uhligiana. 



Branches up to 6 in. in diam., 8- (or fe-vrer r) 

 angrled ; spines in g^roups of 5 "4k on the 

 sides and one in the centre, scarcely h in. 

 long:, ft>ag-ile and of no resistance " . . 167. E. ahyssinicck, 

 Flowering: branches 2-6 in. in diam., flat or 

 3<-8-angled, armed with pairs of spines 

 (sometimes obsolete in 150, E. quinquecostata ; 

 168, E. controversa ; and 169, E. Muirieli) ; 

 leaves usually rudimentary or scale- 

 like, but in 160, E. Dawei ; 173, E. similis ; 

 174, E.tenebrosa; 177, E. neglecta ; 178, E. 

 Winkleri; 179, E. ohovalifolia ; and 189, E. 

 hermentiana, often developed and foliage- 

 like, 3—5 in. long. 

 •Spine-shields united into a continuous horny 

 margin to the stem-angles. 

 Spines -^2^ in. long, very stout; branches 



3-angled 157. E. hreviarticnlate. 



Spines ^|- in. long, stout; branches 7-8-angled, 



spirally twisted 147. E. Dinteri. 



Spines A - ^ 'ii- long ; bi-anches 3-5-angled or 

 rarely flat, not spirally twisted. 

 Flowering branches with very thin wing-like 

 angles, about ^ lin. thick when dried. 



