"52176" . . . _:b76041156 . "Potamogeton x drucei Fryer, 1892" . _:b76041156 "5642297" . _:b76041156 . . _:b76041156 "GBIF id" . _:b75446294 . _:b75446294 "52176" . _:b76041156 . "115347" . . . "Potamogeton x drucei" . _:b75446294 . _:b75446294 "BDTFX id" . "Fryer, 1892" . . . "5642297" . "Potamogeton x drucei" . "Potamogeton x drucei" . . . _:b75446294 .