Pondweeds of Great Britain and Ireland /
Preston, C. D.(Christopher David),1955-
Ellis, L. T.
Botanical Society of the British Isles.
London : Botanical Society of the British Isles,
1995.
Spine title: Pondweeds.
Includes bibliographical references and index.
Ruppiaceae
Ruppiaceae
Potamogetonaceae
Potamogetonaceae