West Highland Flora

Water Whorl-grass


Catabrosa aquatica

 

Catabrosa aquatica

Photo John Birks
Dept of Biology, Univ. of Bergen
Aug 1986 Sanday

Uncommon where fresh water flows across coastal sand or shingle.

Stems to 70 cm tall.  Spikelets c 2.5-5 mm long.  Ligule c 2-8 mm long.

ID: Inflorescence branches are in half-whorls on alternating sides of the main stem.

Other features: Our plants are probably all subspecies uniflora and have 1-2 florets per spikelet.  Upper glume about half as long as lemmas, lower glume about half length of upper.  Glumes almost as broad as tall (when straightened out).  Spreads by above-ground stolons, rooting at the nodes.  Leaves broad, not tapering until near the tip.

 

Catabrosa aquatica

Photo John Birks
Dept of Biology, Univ. of Bergen
Jul 1975 Ardnave, Islay

  Catabrosa aquatica

Photo John Birks
Dept of Biology, Univ. of Bergen
Aug 1986 Sanday

 

Catabrosa aquatica

Photo John Birks
Dept of Biology, Univ. of Bergen
Jul 1975 Ardnave, Islay


Back to species list