Carr, S.M., Seifert, M., Delabaere, B. and Jaffe, M.J. (1995) Pith autolysis in herbaceous dicotyledonous plants—A physiological ecological study of pith autolysis under native conditions with special attention to the wild plant Impa- tienscapensis Meerb. Annals of Botany, 76, 177-189.