The only substantial difference between the two subspecies seems to be the fact that ssp. marlothii has stilt-roots. Other differences are more a matter of gradation. The first picture represents what to my mind is the most common (and not terribly attractive) form.
This subspecies is found mainly in the Little Karoo and adjacent areas (from Worcester to east of Oudtshoorn), but occasionally also on the Knersvlakte. It prefers dry rocky slopes, usually in the shade of rocks or other plants.
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