482 



CXXII. EUPHORBIACEiE (bROWN). 



[Euphorbia, 



subsessile, but often 

 tapering to the base; 

 ovary and capsule 

 glabrous. 

 Leaves ^Ij in. long, 

 crowded ; umbel 7-10- 

 rayed, dense 

 Leaves mostly 2-6 in. 

 long ; umbel 3-5- 

 rayed. 

 Bracts f— 2 in. broad; 

 umbel-rays 3-8 in. 

 long 

 Bracts ^— ^ in. broad; 

 umbel-rays ^1 in. 

 long. 

 Bracts ^ in. broad, 

 with overlapping 

 margins, forming 

 a cup, finally free 

 Bracts ^^ in. broad, 

 not overlapping at 

 the margins 

 Shrubs or frees ; h-ancldets distinctly ivoody, spine- 

 ti'pfedy rigid ; ovary puberulous to fomentose. 

 Branches usually repeatedly 3-forked 

 Branches alternate, widely or subhorizontally 

 spreading. 

 Involucres solitary, mostly axillary or on short 

 axillitry shoots scattered along the 

 branches, sometimes terminal. 

 Branches Iciily at the time of flowering; 



involucre l^>-2 lin. in diam. 

 Branches usually leafless at the time of 



7-4. E. whyteana. 



59. E. maerophylla. 



62. E. ugandensig. 

 71. E. usambarica. 

 Ho. E. matabelensis. 



81. E. lyciopsi*. 

 81. E. spinescens. 



Involucres usually in umbel-like cymes or 2-3 



in a cluster, sometimes solitary, 2—3 lin. 



in diam.; branches usually leafy at the 



time of flowering. 



Leaves glabrous on both sides ; East Africa 82. E. cuneata. 



Leaves minutely puberulous on both sides ; 



Angola 83. ^. Currori. 



Shrubs or trees, woody or succulent; branchlets terete, 



neither spine-tipped nor armed with spines, and 



tvlen succulent neither tessellate nor iuberculate. 



Leaves present on the flowering branches. 



Leaves linear, 1-2 in. long, surrounding the 



terminalsolitary involucre; branches fleshy 93. E. sepium. 

 Leaves obovate, oblanceolatc, ovate, elliptic 

 or orbicular, petiolate or tapeiing to the 

 base. 

 Leaves (including the petiole, where pi'esent) 

 2-6 in. long. 

 Involucres in terminal umbels with rays 

 1-3 in. lonjr. 



