categoryZGrasses Grasses List 

BULBOUS RUSH

Juncus bulbosus

Rushes Family [Juncaceae]

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category
category8Grasses
 
status
statusZnative
 
flower
flower8green
 
flower
flower8brown
 
morph
morph8actino
 
petals
petalsZ6
(3+3)
stem
stem8round
 

18th Aug 2015, ingot pool, Coppermines Valley, Coniston, Cumbria. Photo: © RWD
Grows on acidic soils such as upland bogs, damp heaths and often in shallow pools as here.


18th Aug 2015, ingot pool, Coppermines Valley, Coniston, Cumbria. Photo: © RWD
It grows to about 30cm in soil (as here), or up to 100cm when floating.


18th Aug 2015, ingot pool, Coppermines Valley, Coniston, Cumbria. Photo: © RWD
Leaves narrow and often jointed, bronze-coloured if floating. The plant is forked.


18th Aug 2015, ingot pool, Coppermines Valley, Coniston, Cumbria. Photo: © RWD
Tapals are green when fresh. Fruits brown.


18th Aug 2015, ingot pool, Coppermines Valley, Coniston, Cumbria. Photo: © RWD
Fruits are Tri-lobed surrounded by six long pointed tepals.


18th Aug 2015, ingot pool, Coppermines Valley, Coniston, Cumbria. Photo: © RWD
Fruits tri-lobed, sometimes with the lobes divided in two (left).


18th Aug 2015, ingot pool, Coppermines Valley, Coniston, Cumbria. Photo: © RWD
Remnants of style attached at top of fruit.


18th Aug 2015, ingot pool, Coppermines Valley, Coniston, Cumbria. Photo: © RWD
Fruits spilt along the lobe edges.


There are said by some to be two differing sub-species of Bulbous Rush:

  • (Juncus bulbosa ssp. bulbosus)
  • (Juncus bulbosa ssp. kochii)
However, the exact way(s) in which they differ or are to be differentiated by varies between two opinions, and some experts question the validity of the two sub-species. It might just be that it is actually as some books say, highly variable.

Uniquely identifiable characteristics

Distinguishing Feature : For a Rush - the tri-lobed fruits are a dead giveaway.


  Juncus bulbosus  ⇐ Global Aspect ⇒ Juncaceae  

Distribution
 family8Rushes family8Juncaceae

 BSBI maps
genus8Juncus
Juncus
(Rushes)

BULBOUS RUSH

Juncus bulbosus

Rushes Family [Juncaceae]