Family: Polygonaceae Creeping Knotgrass Polygonum chamaechyton (P. humifusum) Flowering time Habitat Part of the Polygonum aviculare group. Stems remaining prostrate and +/- ridged. Heterophyllus, the leaves 7-12 x 1.5-2.5mm and 15-20 x 4-5mm. Long internodes, usually 15-30(-50)mm. Perianth lobed to 1/3 to 1/2. Buds usually deep rose-pink. Can be variable - leaves either narrow and acute or broader and obtuse

Creeping Knotgrass, Polygonum chamaechyton
Photographs: Kingston Lacy, Dorset. September 2020