AN (ECOLOGICAL SURVEY OF THE MIDLANDS OF NATAL. 531 



Leucosidea sericea is abundant. This is a typical alpine 

 species of the Drakensberg. 



Behind the Zwaartkop, not rising- to the same altitude, there 

 is the peak of the Little Zwaartkop. Over the tops of the two 

 the grasses already mentioned are found, but Anthistiria, 

 Aristida and Andropogon are most abundant. Stiburus 

 alopecuroides is common in the marshy spots. In addition, 

 the following plants make up the plant formation of the 

 mountain top : 



Protea hirta, Alepidea amatymbica, Kalanchoe 

 thyrsiflora, Gerbera aurantiaca, Gazanea longi- 

 scapa, G. sp., Psammotropha myriantha, Sebtea 

 crassultef olia, Tulbaghia acutiloba, Wurmbea 

 kraussii, Euryops setiloba, E. pedunculatus, Cyc- 

 niuni adonense, C. racemosum, Sutera breviflora, 

 Erica sp., Hypoxis kraussiana, H. angus tifolius, 

 H. platypetala, Scilla lancaefolia, S. globosa, S. spp. 



On bare rocks with little or no soil the following : 



Aloe natalensis, several species of Crassula, Sela- 

 ginella rupestris, Hypoxis kraussiana, Pellsea 

 consobrina, P. calomelanus. 



In the moister spots : 



Hopubia cana. Gladiolus ecklonii, Satyrium 

 cordifolium, S. longicauda, S. macrophyllum, 8. 

 parviflorum, S. sphajrocarpn m, Disa spp., Brachy- 

 corythis pubescens, Di speris sp.,Habenaria bonatea, 

 H. spp. 



In fact these moist places on Zwaartkop are among the best 

 of our localities for ground orchids. 



The Zwaartkop mountain, though it rises high above the 

 level of its own terrace, is at the same time far below 

 the altitude of the mountains which form the range of the 

 Drakensberg. In the case of Zwaartkop, as a whole, the 

 vegetation is typical high veld and close bush, with a few 

 patches of rocky hillside formation and small vleis. However, 

 at the higher altitudes the presence of many species not found, 

 or if found not abundant, at lower altitudes, gives a distinctive 



