South African Ferns and their Distribution. 299 



198. Selaginella depressa, A. Br. 



This is now found to be not uncommon in Natal, growing 

 alike on the exposed rock surfaces on the top of the 

 Zwartkop and on the damp rocks around waterfalls and 

 forest streams. 



Cape (Thunberg ; Menzies). 



Kaffraria :— Mount Fletcher (T. E. Sim). 



Natal (McKen) : — Inanda and Town Hill (Natal Government 

 Herbarium). Zwartkop (Stayner). Sweetwaters, Bul- 

 wer, &c. (T. B. Sim). 



199. Selaginella Kraussiana, A. Br. 



East, Kaffraria, and Natal (F. of S. A.). 

 Transvaal: — Pilgrim's Best (McLea). 

 Bhodesia :— Umtali, 1892 (J. F. Darling). 



200. Selaginella integerrima, Spring. 



Transvaal : — Magalisberg (Sanderson ; see F. of S. A.). 



201. Selaginella tectissima, Baker. 



Transvaal : — Magalisberg (Sanderson). 



202. Selaginella Cooperi, Baker. 



Orange Biver Colony (Cooper 1056). 



203. Selaginella Mackenii, Baker. 



Natal (F. of S. A.). 



204. Selaginella imbricata, Spring. 



Zambesiland (Baker, " Fern Allies," p. 87). 



205. Selaginella (species). 



This is mentioned in " Ferns of South Africa," p. 262. Since 

 then Mrs. Bennett has sent in the same species from the 

 same district — Umtali — but unfortunately not yet in 

 condition for identification. 



206. Azolla pinnata, B. Br. 



Cape and Natal (F. of S. A.). 



207. Isoetes natalensis, Baker. 



Natal (F. of S. A.). 



208. Isoetes Wormaldii, Sim (New Species), PI. V. 



Bootstock 3-lobed ; leaves 50 to 70, ligulate-terete or some- 

 what flattened, 9-18 inches long, 1 line diam., hardly 

 narrowed to the rounded point, flaccid, rising to the 

 surface, then floating. No stomata on the submerged, 

 parts ; floating parts dark green and grass-like. Veins 

 one central and one marginal on each side throughout. 

 Membranous leaf-base dilated and its margins enclosing 

 and half-covering the sporange, which is axillary, 

 usually produced in the axil of every leaf, ^ inch long, 



