This vegetation is found on the crest of the Bontberg Mountain Range, as well as places where sandstone is exposed on the mountain slopes. The vegetation can be described as typical Fynbos, consisting of Protea, Erica, restioid species and many more, such as Agathosma, Pelargonium, Passerina, Muraltia, Aspalathus, Euryops and Helichrysum species.

The Fynbos, however, differs considerably from one area to another on Vaalkloof — on the crest of the Bontberg Mountain, and particularly on the southern side, the Fynbos is almost mesic (moist and lush), while on the lower northern slope, the Fynbos is very arid. The Fynbos is closely associated with the sandstone formations of the Witteberg Mountains, from the crest of the range right down to lower altitudes on the north-facing slopes.

Plant species of this vegetation type include no less than 21 species of Proteaceae, which is significantly high for any area. Another interesting species collected was Agathosma acocksii (boegoe) — it is a rare Fynbos endemic and completely restricted to the Bontberg. The Leucadendron nitidum is a very disjunct population, which is very different from the known Nitidum. The Protea witsenbergensis (skaamrosie) is the most southerly distribution of the species and its presence on Bontberg was first confirmed during 1998.

The combination of the 21 Proteaceae is unique and indicates that Bontberg forms a biogeographical link between the flora of the Cederberg/Koue Bokkeveld and the Swartberg.

• Plateau Fynbos on sandy mountain tops
• Grassy Fynbos on the shale slopes
• Renosterveld & Renosterveld transition with Karoo
• Succulent Karoo on the plains.