Polygonum arenarium

Amsterdam - Netherlands

Illustration, diagnostic features, habitat and distribution of lesser red knotgrass.

Related
Thalictrum minus ssp arenarium
United Kingdom

Information and several photographs of the Lesser Meadow-rue.

Netherlands

Illustration, diagnostic features, habitat and distribution of equal-leaved knotgrass.

Polygonum aviculare
United Kingdom

Photograph and information on this species.

Russian Federation

Photograph and information on this species, its description, distribution, ecology and economic significance as a weed species.

Netherlands

Photographs, diagnostic features, habitat and distribution of northern knotgrass.

Polygonum fagopyrum
United States

Information from Botanical.com, a modern herbal, on this plant, its description, cultivation, constituents, medicinal action and uses.

Canada

Photographs of pale persicaria, its flowers and foliage.

Netherlands

Photographs, diagnostic features, habitat and distribution of sea knotgrass.

Netherlands

Photographs, diagnostic features, habitat and distribution of Ray's knotgrass.

Polygonum oxyspermum
United Kingdom

Information on this species of sandy shores with three photographs.