562 J. w. BBWS. 



Hum, Senecio tugelensis, S. evansii, S. macro- 

 cephalus var. hirsutissimuSj S. clrakensbergeiisis, 

 S. tanacetoides, Berkheya grandiflora var. alterni- 

 folia, B. speciosa, B. radula, B. evansii, B. (Stoboea) 

 purpurea, Gerbera ambigua, Gr. parva, Dicoma ano- 

 mala var. circioides, Dimorphotheca nudicaulis var. 

 latif olia, 



Ericace^. — Erica algida, E. flanagani, E. schlech- 

 teri, E. oatesii, E. caffrorum, E. cerintlioides, E. 

 woodii, E. alopecurus, E. frigida, E. thodei. 



Other Orders. — Muraltia flanagani, Polygala liis- 

 pida, Heliophila subulata, Silene capeusis, Dian- 

 thus scaber, Cerastium dregeauum, Psammotropha 

 androsacea, Corydalis cracca, Geranium incanum, 

 G. tliodei, Pelargonium inquinans, P. alcliemil- 

 loides, Sutherlandia frutescens, Argyrolobium 

 pilosum, Indigofera liedyantlia, Lotononis wyliei, 

 Royena cordata, R. hirsuta, Valeriana capensis, 

 Lobelia preslii, Stachys bolusii, Salvia steno- 

 pliylla, Schizocbilus angustif olius, S. gerrardi, 

 Brownleea ca3rulea, Asparagus steliatus, A. plu- 

 mosus, A. africanus, Ixia brevifolia Saudersonia 

 aurantiaca, Galtonia candicans, H^e.i.aixtlius liir- 

 sutus, Morgea edulis, Encephalarlos gliellinckii, 

 and the fern Clieilanthes multifida. 



The presence of bulbous monocotyledons is a featui'e 

 worthy of note. 



IV. THE SUCCESSION AND INTER-RELATIONSHIPS 

 OF THE PLANT FORMATIONS. 



On the cliffs of the Drakensberg the plant succession is 

 as follows : The pioneer vegetation is lithophilous, consisting 

 of various Cyanophycese, followed by lichens, mosses and 

 hepatics, and algae. Different stages can be distinguished, 

 beginning with fi*eshly broken rock surfaces and ending Avith 

 with wet rock flushes. The chomophyte vegetation follows 



