G8 



South Africa. D. biflora occurs in the High Veld of Natal 

 and the Transvaal. D. eleusine is another somewhat rare 

 eastern hydrophilous species, and D. paucinervis is confined 

 to the Western region. All the species are coarse, tufted, 

 deep rooted, and of little grazing value. 



Ehrharta. This genus is of temperate affinities, and 

 chiefly South Western distribution. Some of the species are 

 common on the coast sand dunes at the Cape, being chiefly 

 characteristic of the psammosere, e.g., Eh. calycina, Eh. 

 brevi folia, Eh. uniflora, Eh. villosa. The last-mentioned is 



Fig. 12. — Transverse Section of a leaf of Ehrharta setacea (x about 120). 



common as far east as Port Elizabeth. Several of the species 

 form very definite and sometimes fairly extensive consociations 

 among the Macchia vegetation, e.g., Eh. setacea, Eh. aphylla, 

 and Eh. ramosa. The majority of the 25 species are confined 

 to the Cape, but like so many of the Cape genera, Ehrharta 

 includes one or two species which have a wider range. Eh. 

 calycina, a very variable species of which Nees distinguished 

 six varieties, extends northwards through the Western region, 

 and eastward through the Karroo and Central region to 



