484 cxxii. EUPHORBiACE^ ( BROWN). [Euphorbto^ 



Branches tuberculate with prominent 

 flowering cushions 1-2 lin. in 

 diam.; styles -^ lin, long . . 88. E. nodosa. 



Branches distinctly succulent or if sub- 

 woody with a green or greyish bark . 

 Involucre and ovary puberulous or 

 pubescent. 

 Branchlets not articulated to the 

 stout branches ; involucres solitary 

 (always?); pedicel of ovary 

 scarcely exceeding the involucre . 94. E. Rogerii. 

 Branchlets articulated to the branches ; 

 involucres 3 or more together in 

 terminal clusters; pedicel of 

 ovary much exceeding the in- 

 volucre. 

 Ultimate brnnchlets mostly about 

 1 lin. thick (dried) ; male in- 

 volucres 1|— 2 lin. in diam. . 103. E. medur, and var. 

 Ultimate branchlets usually about 

 1^ lin. thick (dried) ; male in- 

 volucres 2 lin. in diam. . . 101. E. rhipsaloid'i'i. 

 Involucre and ovary (where known) 

 glabrous. 

 Branchlets opposite or forked. 



Flowering branchlets I-I5 lin. thick 

 (dried); involucre 1^ lin. in 

 diam. ..... 106. E. negromoniana. 



Flowering branchlets ^— ^ lin. thick 

 (dried) ; involucre scarcely 1 lin. 

 in diam. ..... 107. E. spartaria. 



Branchlets alternate or some opposite, 

 irregular. 

 Involucres 1 lin. in diam., sessile or 

 subsessile in small clusters at the 

 tips of the branchlets ; styles \ lin. 

 long ..... 105. E. scoparia. 



Involucres 1^-3 lin. in diam., in 

 terminal umbels or cymes, on 

 peduncles (rays or branches) 

 1^-10 lin. long. 

 Mature involucre (including 

 glands) 3 lin. in diam. ; styles 

 1 lin. long .... 100. E. uiilica. 



Mature involucre (including 

 glands) 1^-2 lin. in diam. 

 Branches (dried) evidently 

 fleshy ; umbel -rays or pedun- 

 cles 3-10 lin. long . . 97. E. lateriflora. 

 Branches (dried) apparently 

 somewhat woody ; umbel- 

 rays or peduncles 1-|— 5 

 lin. long. 

 Bracts under the involu(;re 

 broadest near or at the 



