Seed sterility and germination problems in S. wallichii (DC.) Korth. and S. khasiana (Dyer) Bloemb. (family Theaceae) has been studied. Production of high percentage of viable seeds with a capacity to germinate quickly is an ideal pre-requisite for the proliferation of tree species. Natural regeneration of S. wallichii (DC.) Korth. and S. khasiana (Dyer) Bloemb (family Theaceae) suffers due to high seed sterility (50%), poor seed germination and high seedling mortality (80 – 90%). Seed germination results showed that 25oC temperature and completed darkness was the favourable condition for germination in S. khasiana seeds. However, temperature did not have significant affect on the germination of S. wallichii seeds. In both species entire process of embryo germination was completed earlier than the seeds. Thus, the seed coat has slowed germination process in both species. Small proportion of filled seeds and lower percentage of viable embryos could be the reasons for poor regeneration of S. khasiana through seeds in nature. Contrary to this, greater proportion of filled seeds in S. wallichii with higher percentage of viable embryos are the causes of better natural regeneration.
Keywords Schima, Theaceae, seed sterility, embryo viability