Irish wildflowers BSBI map

Ray's Knotgrass, Polygonum oxyspermum, Glúineach ghlé
Photographs: Sherkin Island, Co. Cork

Ray's Knotgrass
Polygonum oxyspermum (previously subsp. raii)
Glúineach ghlé
Family: Polygonaceae

Flowering June-November. Annual, biennial or short-lived perennial

Clusters of tiny greenish-white flowers with 5 petals, red-edged. The fruit is a glossy brown nut and longer than the calyx. Prostrate growth habit, the elliptical green-grey leaves with slightly rolled back edges. The sprawling stems often become woody at the base.

Scattered distribution around the Irish coast on sand and shingle beaches, usually above the highest tide level.

Ray's Knotgrass, Polygonum oxyspermum, Glúineach ghlé

Ray's Knotgrass, Polygonum oxyspermum subsp raii, Glúineach ghlé

Ray's Knotgrass, Polygonum oxyspermum, Glúineach ghlé
Ray's Knotgrass, Polygonum oxyspermum (previously subsp. raii), Glúineach ghlé

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