Zantedeschia pentlandii, one of our three yellow arums) grows on the slopes leading down to the river. Endemic to this area, it is celebrated in nearby Roossenekal in the annual spring "Yellow Arum Lily Festival".
Other highlights were finding Moraea triffida (the flower is about the size of a R2 coin) and, in the fading light of a stormy evening, seeing Gladiolus longicollis subsp. platypetalus with its scented petals. (Thanks to John Manning for help with identification.)
Another surprise was the spectacular Pelargonium luridum that grows in the tall grass.
I will post more photos and information soon....