Botany 28 Dissertations 15 Dissertations, Academic 15 Botany, Medical 9 Classification 7 Medicinal plants 7 Callus (Botany) 5 Regeneration (Botany) 5 Embryology 4 Growth 4 Roots (Botany) 4 Ginger 3 Nepenthes 3 Oil palm 3 Therapeutic use 3 Botanical chemistry 2 Ecology 2 Herbs 2 Hevea 2 Physiology 2 Plant tissue culture 2 Plants 2 Rutaceae 2 Soils 2 Spores (Botany), Fossil 2 Zingiberaceae 2 Abscission (Botany) 1 Acacia 1 Albertisia megacarpa 1 Alstonia 1