I think I have heard of putting a leaf of one of the rose scented hybrids at the bottom of a cake pan for flavoring or scent, but in general pelargoniums are not eaten by people. Some of the geophytic spp like P rapaceum may have been eaten by the original inhabitants of the Cape but in general the geophytic species are rare enough that encouraging their consumption as a part of "foraging" would be a bad idea. P sidoides is supposed to have some value for some respiratory conditions, it could be easily cultivated to supply demand for the product as it grows readily from seed or tuberous root divisions. Ernie DeMarie New York, where some crinums in pots are in bloom and galtonias in the garden are spiking.