Family: Polygonaceae Knotgrass sp. Polygonum parvulum Flowering time Habitat Part of the Polygonum aviculare group. Stems remaining prostrate, internodes usually to 5mm. Leaves linear or linear-lanceolate, not heterophyllus, 3-7(-10) x 0.7-1.5mm Perianth lobed to 1/2, 1.8-2mm. Achenes 2-2.5mm

Knotgrass sp, Polygonum parvulum
Photographs: Kingston Lacy, Dorset. September 2020