J^hyllanthm.^ cxxii. euphorbiace/E (hutchinson). 695 



Styles erect or subeiect, free to the 



l^ase 25. />. angolensis. 



Styles erect, coimatc in the lower 

 half, free parts recurved or 

 spreading. 

 Leaves elliptic or obovate, 2-4 lin. 



long ; styles slender . . 8. i'. loandensis. 

 Leaves linear-lanceolate, f-l| in. 



long ; styles very thick . 26. P. purpureus. 

 JJStaMH'ns 3. 



Perennials; sepals 6. 



Stems simple or subsimple, arising from a 

 woody rhizome. 



Flowers dioecious 27. jP. alpestris. 



Flowers monoecious 28. /-*. glancophyllus, 



var. major. 

 Shrubs; slemsbranched, not from a rhizome 13. P. meruensis. 



Annual herb ; sepals 5 29. P. benguelensis. 



tfStamens 3 ; filaments connate their whole length or 

 nearly so. 

 Sepals of both sexes 5, those of the female in a 

 single series. 

 Flowers dioecious. 

 Leaves reticulate, margins slightly recurved . 30. P. arvensis. 

 Leaves not reticulate, with reddish margins . 31. P. microphyllinus. 

 Flowers monoecious. 



Styles absent ; stigmas sessile ; leaves slightly 



woolly-pubescent ..... 32. P. suhlanatus. 

 Styles present, sometimes short; leaves not 

 woolly-pubescent. 

 Ovary prominently warted. 



Styles very slender, spreading ; stigmas 

 not swollen ; disk of female flower 



5-lobed 33. P. niruroides. 



Styles erect; stigmas globose; disk of 



female flowers crenulate . . . 34. P. leucocalyx. 



Ovary smooth. 



Diskof female flower large, fleshy, support- 

 ing the stipitate ovary like a collar 35. P. microdendron. 

 Disk of female flower flat ; ovary not 

 or only slightly slipitate. 

 Disk of female flowers 5-lobed, lobes 



triangular .... 36. P. amarus. 



Disk of female flowers crenulate or 

 undulate, not regularly lobed. 

 Leaves conspicuously nmcronate . 37. P. Paxii. 

 Leaves not or scarcely mucronate. 

 Male disk-glands smooth. 



Under-slirub; stales spreading 38, /'. hut chinsoni anus. 

 Annual ; styles erect or sub- 

 erect . . . . 39. p. Boehmii. 

 Male disk-glands frtrongly warted 40. P. Dekindtii. 

 Sepals of both sexes 6, those of the female often 

 in 2 series. 

 rio.\ ers dioecious. 



