Dorstenia. 



cxxiiil. morace^ (Rendle). 



29 



D. alta. 

 D. Smythci. 

 D. angnsticorn\ 



70. D. Schkchteri. 

 71.-0. Warncckii. 



**Receptacle cuneiform -triangular, without 



bract-ckfras ... ... ... ...66.-0. amcp.na. 



***Receptacle elongated, with a bract-arm at 

 each end : 

 Receptacle boat-shaped : 



Margin of receptacle 2-2^ lin. wide ... 67. 



Margin of receptacle less than ^ lin. wide 68. 



Receptacle linear ... ... ... ... 69. 



c. Stems succulent, marked at the nodes with 



roundish seal-liko leaf-scars ; male flowers 

 2-3-androus ; female numerous ; style 2-fid 

 at the apex. 

 Receptacle orbicular ; bract-arms equal or 



exceeding its diameter 

 Receptacle broadly elliptic ; bract-arms 

 about half its diameter 



d. Stems succulent, one or few from a basal gene- 



rally depressed-globose (placentiform) tuber, 

 leafy only in the upper part, scale-bearing 

 below ; leaves attaining full development 

 after flowering. Receptacle orbicular or 

 elliptic ; bract attached below the serrate 

 or crenate margin ; style 2-fid at the apex 

 only. 

 Receptacle orbicular : 

 Leaves narrowly linear-lanceolate, 1 lin. wide 72. D. katangensis. 

 Leaves not less than 4 lin. wide : 



Bract-arms few, 2-5 (rarely up to 8) 



Margin of receptacle crenulate 73. 



Margin of receptacle eiliate ... ... 79. 



Bract-arms numerous, 7-15 : 



Disc of receptacle in flower not exceeding 

 \ in. in diameter : 

 Longer bract-arms exceeding the 

 diameter of the receptacle : 

 Leaves oblong-lanceolate to ellip- 

 tic 



Leaves linear-lanceolate 

 Leaves lanceolate-acuminate 

 Longer bract-arms about equal to the 

 diameter of the receptacle 

 Disc of receptacle in flower \~\ in. in 

 diameter 

 Receptacle elliptic (boat-shaped in 83, D. 

 caudata). 

 Bract-arms many, radiating : 



Leaves lanceolate ; bract-arms J in. long 

 Leaves narrowly spathulate ; bract-arms 

 ^ in. long. 

 Bract-arms 1 or 2 : 

 Receptacle sessile or subsessile : 

 One bract-arm from each end 

 A bract-arm only from the upper end 

 Receptacle stalked ; bract -arms 2 



D. Dehcer^tii. 

 D. mirahilis. 



