Photographs: Co. Cork

Knotgrass Polygonum aviculare Glúineach bheag Family: Polygonaceae Flowering time: July - October. Annual. Native. Tiny white striped green flowers often tinged with pink. Leaves lanceolate to oval, hairless. Erect or sprawling growth habit. Can form large patches on bare ground. Height/spread: patches to 1m across. Common on bare ground, wasteland, arable land. Nitrogen indicator. Resistant to trampling. Similar: Equal-leaved Knotgrass, Polygonum arenastrum

Knotgrass, Polygonum aviculare, Glúineach bheag