| Polysiphonia fucoides | |
|---|---|
 | |
Scientific classification  | |
| (unranked): | 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.
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]
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]
On open rock, in pools in the littoral. [1]
Generally distributed around Great Britain, Ireland, Isle of Man and the Channel Islands. [1]
Polysiphonia lanosa is a common species of the red algae (Rhodophyta) often to be found growing on Ascophyllum nodosum.
Polysiphonia denudata is a small red alga, Rhodophyta, growing as tufts up to 20 cm long without a main branch axis.
Polysiphonia elongata is a small red marine algae in the Rhodophyta.
Polysiphonia fibrata is a species of Polysiphonia that grows as small dense tufted and finely branched marine alga in the Rhodophyta.
Polysiphonia fibrillosa (Dillwyn) Sprengel is a species of marine red alga in the Rhodophyta.
Polysiphonia foetidissima Cocks ex Bornet is small red marine alga in the Rhodophyta.
Polysiphonia furcellata (C.Agardh) Harvey is small marine red alga in the Division Rhodophyta.
Melanothamnus harveyi, Harvey's siphon weed, is a small marine red alga in the division of Rhodophyta.
Polysiphonia nigra is a species of marine alga in the division Rhodophyta.
Polysiphonia stricta is a small red marine alga in the Division Rhodophyta.
Vertebrata subulifera is rather small marine alga in the division Rhodophyta.
Vertebrata fruticulosa(Boergeseniella fruticulosa Kylin) is a small marine alga in the Division Rhodophyta.
Vertebrata thuyoides is a small marine algae in the Division Rhodophyta.
Ceramium botryocarpum is a small red marine alga in the Division Rhodophyta.
Ceramium secundatum is a small marine red alga.
Ceramium shuttleworthianum is a small marine red alga.
Membranoptera alata is a small red alga in the Rhodophyta.
Phycodrys rubens is a red marine alga of up to 30 cm long.
Phyllophora pseudoceranoides, the stalked leaf bearer, is a small marine red alga.
Polyides rotunda is a species of small red marine alga in the family Polyidaceae.