| 词条 | Plocamium cartilagineum |
| 释义 |
|image =Plocamium cartilagineum Helgoland.jpg |image_alt = Plocamium cartilagineum herbarium sheet |image_caption = Plocamium cartilagineum herbarium sheet |genus = Plocamium |species = cartilagineum |authority = (Linnaeus) P.S.Dixon }} Plocamium cartilagineum is a medium sized red marine alga. DescriptionPlocamium cartilagineum is an erect red alga growing to 10 cm in length. The main axes is flattened with regular flattened branches on both sides. The branches are long and short alternately, the short ones on one side are opposite the longer on the other side. These longer branches bear two or three short curved branches in series, comb-like. The plants are fully corticated. This branching pattern is similar to Plocamium lyngyanum and Plocamium maggsiae the other European species which have only recently been distinguished.[1][2]HabitatCommon on rock in the lower littoral and deeper to 30.[1][3] ReproductionThe plants are dioecious. The male structures are microscopic. The female cystocarps grow to 1 mm in diameter and are on the margins of the frond. The spermatangia are within the youngest branches in sori. The tetrasporangia are microscopic.[1] DistributionCommon all around the British Isles including the Shetlands and Channel Islands.[3] References1. ^1 2 Bunker, F.StP.D., Brodie, J.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}} {{Taxonbar|from=Q21344680}}2. ^Dickinson, C.I. 1963. British Seaweeds. The Kew Series 3. ^1 Hardy, F.G. and Guiry, M.D. 2003 A Check-list and Atlas of Seaweeds of Britain and Ireland. The British Phycological Society {{ISBN| 0-9527115-16}} 1 : Florideophyceae |
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