The only other UK arrowgrass species, triglochin palustris, has a less-dense inflorescence, and is found in a different habitat; inland marshy areas, often on calcareous soils.
Common name:
Sea arrowgrass
Family:
Scientific name:
Triglochin maritima
Main flower color:
Range:
All coastal regions of the British Isles
Height:
Up to 50 cm
Habitat:
Saltmarshes, towards the upper margins
Flowers:
Tiny, with two rows of three purplish-green petal-like lobes enclosing six carpels. Arranged in an unbranched, elongated cluster over the upper half of the leafless stalk
Fruit:
Egg-shaped, six-chambered capsules
Leaves:
Linear, narrow, grass-like (though half-cylindrical in cross-section), up to 40 cm long
Season:
May to January
Rarity:
★★★★★
