Name Ceratophyllum demersum Family Ceratophyllaceae Original book source: Prof. Dr. Otto Wilhelm Thomé Flora von Deutschland, Österreich und der Schweiz...
image is a derivative work of the following images: File:Illustration Ceratophyllum demersum0.jpg licensed with PD-old-auto-expired, PD-scan 2004-10-29T20:26:37Z...
