Investigations of subterranean plant material have been undertaken
with studies on Euclea natalensis (Lall and Meyer, 2000),
Pelargonium reniforme and Pelargonium sidoides (Mativandlela et al.,
2006; Kolodziej and Kiderlen, 2007) and recommendations for further
anti-infective studies to be undertaken on medicinal bulbous
plants of South Africa are proposed in the ethnobotanical paper by
Louw et al.