Rhodymenia holmesii Ardissone
Also known as Rhodymenia pseudopalmata var.
ellisiae (Duby) Guiry
English name: Holmes's Rose Weed.
Description: Thinly fleshy, dark red,
flattened, flaccid fronds, regularly dichotomously branched (up
to 5 times) with narrow angles in the forks, to 80 mm long and 5
mm broad. Fronds arising from a small stipe borne on creeping
stoloniferous growths. When present, it usually occurs in
relatively extensive stands.
Habitat: Epilithic, stolons ramifying in
sponges and in soft rocks; lower intertidal and subtidal to 25
m. Widespread, rare. Widely distributed but uncommon on southern
western and north-western coasts of Ireland and Britain. South
to northern Spain and perhaps Morocco.
Similar species:
Rhodymenia ardissonei,
Rhodymenia pseudopalmata
and
Schottera nicaeensis.
Photographs: East of the Skerries, Portrush, Co. Antrim, Ireland; August 2013 © Francis Bunker
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