Typical annual and perennial individuals inhabited in Queensland, Australia. a. Collection sites in Queensland, Australia. Details were described in Table 1. Approximately a scale bar is 100 km. b. Annual population of O. meridionalis at the end of rainy season. c. Annual rice died and left shedding seeds over ground at Jpn6 site in August, d. Perennials inhabited through a year at Jpn1 site. In end of April, there was still water inside the swamp and perennial wild rice plants were grown. Arrow heads showed rice plants. e. Close up of perennial rice at Jpn1 site. f. There was still muddy at Jpn1 site in August. Around the same tree where wild rice plants were grown at April, perennial wild rice plants survived. Arrow heads showed rice plants. g. Perennial wild rice plants found at Jpn2 site at April, 2010. Arrow heads showed rice plants. Part of the population was closed-up in (h). h. Arrow heads showing perennial rice. i. The population still survived in dry season in August, 2011. Wild rice plants were grown at peripheral zone of the pond. Size of the pond was decreased and alive wild rice plants inhabited at central zone compared to the late rainy season.