West Highland Flora

Great Fen Sedge


Cladium mariscus

 

Cladium mariscus

Photo © Carl Farmer
21 Jun 2004 Brochel, Raasay
Height of picture c 12.5 cm

Occasional, beside lochs on rich, non-acid ground.

Plant to 2.5 m tall.  Leaves 10-18 mm wide.  Fruits c 3 mm long, in spikelets c 2-4 mm long, which are in clusters 5-10 mm wide.  1-4 flowers/fruits per spikelet, 3-10 spikelets per cluster.

ID: Leaves saw-toothed on the margins and on the midrib below.  Inflorescence a panicle of spikelet-clusters.  Picture on left shows inflorescence just beginning to open: when fully open the dark brown clusters are on the ends of panicle-branches.  The clusters are roughy globular in shape and not like the spikes of Carex species.

Other features: A very tall sedge forming large stands visible from a distance (see bottom picture).  Glumes pale brown, the lower 2-3 in each spikelet small and empty.  Fruit dark brown.  Like most non-Carex sedges, the flowers are hermaphrodite and all of one kind, whereas in Carex (and Kobresia) they are male or female and visibly different.

 

Cladium mariscus

Photo © Carl Farmer
21 Jun 2004 Brochel, Raasay

 

Cladium mariscus

Photo © Carl Farmer
21 Jun 2004 Brochel, Raasay


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