| 词条 | Phycodrys rubens |
| 释义 |
|image = |genus = Phycodrys |species = rubens |authority = (Linnaeus) Batters }} Phycodrys rubens is a red marine alga of up to 30 cm long. DescriptionPhycodrys rubens is seaweed which is perennial and can grow to 30 cm long and is strongly red in colour.[1] It grows with flat leaf-like blades which are monostromatic, that is composed of a single flat layer of cells and can grow 3 cm wide. These blades can become 3 cm wide and show a clear mid-rib. The blades have a ruffled margin with veins growing out from the central mid-rib with paired lateral veins. The plants grow from a small disk holdfast with an axis to the blades.[2][3]The algae are somewhat similar to Delesseria sanguinea which is also strongly red but has a smooth, not dentate, margin.[2] The shape of the frond is similar to the leaf of an Oak tree.[3] ReproductionThe gametophytes are dioecious, that is the male and female phases are on separate plants.[2]The reproductive structures are found at the margins of the blades, the cystocarps as branches attached to the veins[4] and the tetrasporangial sori occur near the apices of the larger bladelets.[2] HabitatCommonly found in the littoral, sub-littoral in low rock pools and attached to the stipes of large algae such a Laminaria. Found to a depth 30 m.[2] DistributionCommon on the shores of Ireland,Wales, Isle of Man, Scotland including the Shetland Islands and the north-east and south-east of England. It is not found in the south-east of England.[5]The species is found in the North Atlantic from Spitzbergen to Portugal and Canada.[2] NoteThe fronds adhere well to paper and can be dried to make fine specimens.[3] References1. ^Bunker, F,.StP.D., Brodie, J.A., Maggs, C.A. and Bunker, .R.2017. Seaweeds of Britain and Ireland. Second Edition. Wild Nature Press, Plymouth, UK {{ISBN|978-09955673-3-7}} {{Taxonbar|from=Q3381818}}{{Rhodophyta-stub}}2. ^1 2 3 4 5 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}} 3. ^1 2 Dickinson, C.I. 1963. British Seaweeds. The Kew Series. Eyre & Spottiswoode 4. ^Pound, F.E. 1965. The Biology of the Algae Edward Arnold (Publishers) Ltd 5. ^Hardy, F.G. and Guiry, M.D. 2003. A Check-list and Atlas of the Seaweeds of Britain and Ireland British Phycological Society{{ISBN|0-9527115-16}} 1 : Delesseriaceae |
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