THE VEGETATION OF NATAL. 328 



pensa^ Ludwig-ia spp., Epilobium spp., Scliizo- 

 stylis sp., Salix woodii. 



The following- grow on the moist alluvial soil: Crinuni 

 longif olinni, Anoiganthus bre vif lorus^ Osbeckia 



umlasiana. Richardia africana grows either on moist 

 alluvial soil or near running* water. 



(15) AQUATIC TYPE. 



There reniains the purely Aquatic Vegetation. In the 

 wettest parts of the marshes Typha cape n sis is found. It 

 is also typical of the small lakes forming a Typha associa- 

 tion. 



In addition to this the following aquatic plants are found : 



Nymphasa stellata, 



jSTympheea cape n sis, 



Pistiastratiotes, 



Lemna mi nor , 



Callitriche bolusii, 



U t r i c u 1 a r i a spp., 



Myriophyllum spicatum, 



Triglochin spp., 



Aponogeton natalense, 



Potamogeton (7 species), 



Trapa bispinosa. 

 These occur in the fresh-water lakes, but rarely very 

 abundantly. The leaves of Potamogetons do not form a 

 complete covering over the water. On the whole. Natal is 

 very poor in purely aquatic types of vegetation. There are, 

 however, one or two extremely interesting plants worthy of 

 mention. Hydrostachys natalensis (Podostemacefe) 

 occurs in the rivers, usually under a waterfall. Sphte- 

 rothylax algiformis has also been recorded for Natal. 

 Drosera burkeana is common in moist spots. 



The lagoons have already been described with reference 

 to their mangrove vegetation, but many lagoons have no 

 mangroves. The water in such is brackish, and Zostera 



