Eriachaenium. A General habitat, muddy shores of temporal lakes; central Chubut (Argentina) B Habit detail; notice stems adpressed to the ground C Lateral view of rhizome D Dorsal view of rhizome; compare with C and note the flattened nature of rhizome E Close up of leaves, note the bullate condition. F Detail of heads G Detail of heads; arrows point marginal florets. (Photos by M. Bonifacino)