Stuckenia pectinata

R. Schipper
R. Schipper flowing water form
R. Schipper flowing water form
R. W. Smith
A. A. Reznicek stand
R. Schipper
R. Schipper
R. Schipper
R. Schipper
R. Schipper
R. Schipper
R. Schipper
R. Schipper