Geranium incanum has two varieties: var. incanum with small white or light pink flowers and var. multifidum with larger, light violet to magenta pink flowers (Van Wyk et al, 1997). The plant in picture is Geranium incanum var. multifidum. Compare it with the other specimen (var. incanum), shown in this Album.
Afrikaans names of vrouebossie, bergtee and amarabossie exist for this plant. The use of the plant’s leaves as an infusion in boiling water as a herbal tea to treat bladder infections, venereal diseases and menstrual problems are suggested by these common names (tee = tea; vroue = women; bossie = small bush; the Quassia amara bush is also a Central American plant used for centuries by local populations to treat renal problems (http://portal.unesco.org)). Quassia amara is said to produce the bitterest substance found in nature! (Wikipedia)