Skip to main content
You are here
Facebook icon
Pinterest icon
Twitter icon

Polygonum maritimum (sea knotgrass)

Sea knotgrass is a coastal plant and is the rarest of the knotgrasses in Britain.
Flower and leaves of sea knotgrass

Polygonum maritimum (Photo: Sarah Griggs)

Species information

Common name: 

sea knotgrass

Conservation status: 

Rare

Habitat: 

Sandy beaches

Key Uses: 

Dressing for burns. Potential as an indicator species for climate change.

Known hazards: 

Not known

Taxonomy

Subclass: 
Superorder: 
Caryophyllanae
Order: 
Caryophyllales
Family: 
Polygonaceae
Genus: Polygonum

About this species

This species belongs to the knotgrass family, Polygonaceae. The common name, knotgrass, refers to the swollen nodes of the stems which appear as joints or knots.

Genus: 
Polygonum

main info

Courses at Kew

Students learn about plant taxonomy and identification

Kew offers a variety of specialist training courses in horticulture, conservation and plant science.

Why People Need Plants

image of book cover

A compelling book from Kew Publishing that explores the crucial role that plants play in the everyday lives of all of us.