Polysiphonia fucoides

Polysiphonia fucoides
Scientific classification Edit this classification
Clade: Archaeplastida
Division: Rhodophyta
Class: Florideophyceae
Order: Ceramiales
Family: Rhodomelaceae
Genus: Polysiphonia
Species:
P. fucoides
Binomial name
Polysiphonia fucoides
(Hudson) Greville

Polysiphoides fucoides (Hudson) Greville (Vertebrata fucoides)[1] is a common marine alga[2] in the Division Rhodophyta.

Description

Polysiphonia fucoides is a relatively small seaweed. It grows as branched, cylindrical tufts reaching 30 cm or more in length.[1] The branches are themselves densely branched, the main branch usually distinct. It is attached by matted branches which produce rhizoids. The branches are composed of a central axes of cells surrounded by 11 to 21 pericentral cells all of the same length. Cortication is generally absent but may be formed on the major branches near the holdfast, with the cells growing down in grooves between the pericentral cells.[3][1] The branching may resemble Vertebrata thuyoides, but the branches of B.thuyoides are corticated almost to the tips.[3][1]

Reproduction

The plants are dioecious. Spermatangial branchlets occur near the apices of the branches. Cystocarps are borne on short stalks. and tetrasporangia occur in series towards the apices of the branches.[3]

Habitat

On open rock, in pools in the littoral.[1]

Distribution

Generally distributed around Great Britain, Ireland, Isle of Man and the Channel Islands.[1]

References

  1. ^ a b c d e f Bunker, F.StP.D., Brodie, Juliet, A., Maggs, C.A. and Bunker, A.R. 2017. Seaweeds of Britain and Ireland. Second Edition. Wild Nature Press, Plymouth, UK.ISBN 978-0-9955673-3-7
  2. ^ Hardy, F.G. and Guiry, M.D. 2003 A Check-list and Atlas of the Seaweeds of Britain and Ireland. The British Phycological Society. ISBN 0-9527115-16
  3. ^ a b c Maggs, C.A. and Hommersand, M.H. 1993. Seaweeds of the British Isles Volume 1 Rhodophyta Part 3A Ceramiales The Natural History Museum, London ISBN 0-11-310045-0

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