Dendrocalamus hamiltonii and Schizostachyum dullooa are the two
important threatened bamboo species of Bangladesh. They flowered gregariously during 1996 to 1998 and 1999 at the bambusetum of Bangladesh Forest
Research Institute,Chittagong and RangapaniTeaEstate, Hazarikhil, Chittagong
respectively. The flowering cyclesfor D. hamiltonii were estimated as 43 + 5 years
and for S. dullooa as 45 + 2, 35 + 2 and 15 + 2 years. Observations were made on
flowering nature, death and seed characters of these species. The germination
and seedling characters were also recorded. Planta tions of both the species were
raised with seedlings by the Forest Department and the NGOs. In future these
will be used as ex situ conservation plots.