Dimorphic epidermal cell chloroplasts in the mesophyll-less leaves of an extreme–shade tropical fern, Teratophyllum rotundifoliatum (R. Bonap.) Holtt.: a light and electron microscope study
Department of Botany, University of Malaya, Kuala Lumpur 59100, Malaysia;School of Biological Sciences, Queen Mary &Westfield College, London University, Mile End Road, London El 4NS, UK