Dumont's Red Weed

Dumontia contorta

''Dumontia contorta'' is a relatively small epiphytic algae of the sea-shore.
Dumont's Red Weed - Dumontia contorta *Tentative ID based on the lack of bushiness and sparse branching. Plus, this weed was hollow with tubular parts inflated or collapsed. Color was red with some portions turning yellow. Habitat: Low tide zone Dumontia,Dumontia contorta,Geotagged,Spring,United States,algae,red algae,rhodophyta,seaweed

Appearance

The thallus grows from a discoid holdfast to a length of about 23 centimetres . The fronds branch irregularly and sparingly. The branches are hollow, soft and twisted, dark reddish brown in colour which bleach towards the tips, they clearly taper at their junction.
Dumont's Red Weed - Dumontia contorta Habitat: Intertidal zone Dumont's Red Weed,Dumontia,Dumontia contorta,Geotagged,Spring,United States,algae,intertidal,seaweed

Distribution

Common around the British Isles. Europe from Russia to Portugal and Canada to United States. In the NW Pacific and Alaska.

Habitat

Generally epilithic in rock pools of the littoral zone.

Reproduction

The plants are dioecious with microscopic spermatangia, carposporangia, and tetrasporangia developing in the surface layer, cruciate.

References:

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Taxonomy
KingdomPlantae
DivisionRhodophyta
ClassFlorideophyceae
OrderGigartinales
FamilyDumontiaceae
GenusDumontia
SpeciesD. contorta
Photographed in
United States of America