Dumontia contorta: Difference between revisions
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==Description== |
==Description== |
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The thallus grows from a discoid [[holdfast]] to a length of about 23 |
The thallus grows from a discoid [[holdfast]] to a length of about 23 cm. The [[frond]]s branch irregularly and sparingly.<ref>Jones, W.E. 1964. A key to the genera of the British seaweeds. ''Field Studies'' '''1''' no.4:1 - 32</ref> The branches are hollow, soft and twisted, dark reddish brown in colour which bleach towards the tips, they clearly taper at their junction.<ref name="Irvine 83"/> |
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The plants are dioecious with spermatangia, carposporangia and tetrasporangia.<ref name="Irvine 83"/> |
The plants are dioecious with spermatangia, carposporangia and tetrasporangia.<ref name="Irvine 83"/> |
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Revision as of 02:34, 26 February 2016
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| Species: | D. contorta
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| Dumontia contorta (S.G. Gmelin) Ruprecht
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Dumontia contorta (S.G. Gmelin) Ruprecht [1]
Dumontia contorta is a relatively small epiphytic algae of the sea-shore.
Description
The thallus grows from a discoid holdfast to a length of about 23 cm. The fronds branch irregularly and sparingly.[2] The branches are hollow, soft and twisted, dark reddish brown in colour which bleach towards the tips, they clearly taper at their junction.[1] The plants are dioecious with spermatangia, carposporangia and tetrasporangia.[1]
Habitat
Generally epilithic in rock pools of the littoral.[1]
Distribution
Common around the British Isles. Europe from Russia to Portugal and Canada to USA. In the NW Pacific and Alaska.[1][3]
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References
- ^ a b c d e Irvine, L.M. 1983. Seaweeds of the British Isles Volume 1 Rhodophyta. Part 2A. British Museum (Natural History) ISBN 0 565 00871 4
- ^ Jones, W.E. 1964. A key to the genera of the British seaweeds. Field Studies 1 no.4:1 - 32
- ^ Morton, O. 2003. The marine macroalgae of County Donegal, Ireland. Bulletin of the Irish Biogeographical Society No. 27 pp.3 - 164