Floral Adaptation

I've seen a lot of plants, like this one (in Malalotja Nature Reserve, Swaziland), that flower after a burn. It is the same with the grasses that grazing animals feed on, which is why there are ALWAYS fields burning (set alight by farmers) wherever you drive outside the city. What was once an adaptive development that helped the species survive fires (by coating its seeds it thick wax or something - maybe somebody more informed can help me here) has become a necessary reproductive process. Without fire I don't think these plants can flower at all.