In order to fully understand the survival status of O. rufipogon Griff. in Guangdong Province and make basis for the long-term protection of wild rice in our country,field survey on O. rufipogon Griff. was carried out during 2005-2016. Investigation identified that there were 118 distribution sites of O. rufipogon Griff. currently in 25 counties( cities) in Guangdong,of which 103 sites were recorded historically,the other 15 sites were newly discovered. There had been 1083 distribution sites of O. rufipogon...