single white flower of frogbit - hydrocharis morsus-ranae

aquatic bit botanical botany butterfly colorful common daylight distributed european fern floating flora flower fresh frog frogbit green herb herbaceous horizontal hydrocharis hydrocharitaceae leaves marsh morsus moss natans native natural nature outdoor outside photography plant plants pond ranae reserve roots salvinia salviniaceae serbia serbian single small special standing swamp vascular water watermoss white widely wings zasavica