in essence; at bottom or by one's (or its) very nature

in essence; at bottom or by one's (or its) very nature

in essence; at bottom or by one's (or its) very nature

in essence; at bottom or by one's (or its) very nature

in essence; at bottom or by one's (or its) very nature

in essence; at bottom or by one's (or its) very nature

in essence; at bottom or by one's (or its) very nature

in essence; at bottom or by one's (or its) very nature

in essence; at bottom or by one's (or its) very nature

used in some classifications: essentially equivalent to Potamogetonaceae