Polygonum amphibium
Photographer: A. Meeks
Polygonum arifolium
Photographer: Robert W. Freckmann
Polygonum arifolium
Photographer: Robert W. Freckmann
Polygonum convolvulus
Photographer: Robert W. Freckmann
Polygonum lapathifolium
Photographer: Robert W. Freckmann
Polygonum orientale
Photographer: Robert W. Freckmann
Polygonum punctatum
Photographer: Robert W. Freckmann
Polygonum sagittatum
Photographer: Robert W. Freckmann
Polygonum virginianum
Photographer: Robert W. Freckmann
Rumex acetosella
Photographer: A. Meeks
Rumex acetosella
Photographer: Robert W. Freckmann
Rumex venosus
Photographer: Robert W. Freckmann