categoryZGrasses Grasses List 

SEA RUSH

Juncus maritimus

Rushes Family [Juncaceae]

month8jul month8july month8aug

category
category8Grasses
 
status
statusZnative
 
flower
flower8cream
 
inner
inner8brown
 
petals
petalsZ6
(3+3)
stem
stem8round
 
stem
stem8ribbed
 

23rd July 2016, green beach, Ainsdale, Sefton Coast. Photo: © RWD
A stout and erect plant up to 1m tall with light-green and wiry leaves and stems. Growing near the high-tide line. It is tufted (growing in tight groups). It has a sharp-pointed and stiff leaf-like bract alongside which is similarly round but not as tall as the inflorescence bearing stem.


23rd July 2016, green beach, Ainsdale, Sefton Coast. Photo: © RWD
The many-flowered inflorescence is loose and appears lateral.


23rd July 2016, green beach, Ainsdale, Sefton Coast. Photo: © RWD
The flower clusters are usually erect.


23rd July 2016, green beach, Ainsdale, Sefton Coast. Photo: © RWD
This specimen is flowering, none have yet fruited.


23rd July 2016, green beach, Ainsdale, Sefton Coast. Photo: © RWD
The style ends in three twisted stigmas which are pinkish-red.


23rd July 2016, green beach, Ainsdale, Sefton Coast. Photo: © RWD
The perianth (the 6 'petals'/'sepals') are straw-coloured with the outer 3 being longer than the inner 3, and of differing shape too: the outer 3 have the shape of a boats hull and are sharply-pointed whilst the inner 3 are blunter and 3-4mm long.


23rd July 2016, green beach, Ainsdale, Sefton Coast. Photo: © RWD
The stem is round and also has many longitudinal shallow ribs. The stem feels smooth when run between the fingers either way.


Not to be semantically confused with : Sea Club-Rush (Bolboschoenus maritimum) [a Club-rush plant with similar name. Club-rushes are not members of the Rushes, but rather of the Sedges.]

Easily mistaken for : other tall(ish) Rushes such as Hard Rush (Juncus inflexus), Soft Rush (Juncus effusus), Compact Rush (Juncus conglomeratus), Thread Rush (Juncus filiformis), Baltic Rush (Juncus balticus) and Sharp Rush (Juncus acutus).

The fruit has 3 sides, is light-brown, has a mucronate tip and is about the same height (~4mm) as the perianth (the 3 + 3 'petals'/'sepals').


  Juncus maritimus  ⇐ Global Aspect ⇒ Juncaceae  

Distribution
 family8Rushes family8Juncaceae

 BSBI maps
genus8Juncus
Juncus
(Rushes)

SEA RUSH

Juncus maritimus

Rushes Family [Juncaceae]