Vertebrata subulifera Bunker, F. St.P., Maggs, C.A., Brodie, J.A., Bunker, A.R. 2017. Seaweeds of Britain and Ireland. (Polysiphonia subulifera (C.Agardh) Harvey) Maggs, C.A. and Hommersand, M.H. 1993. Seaweeds of the British Isles Volume 1 Rhodophyta Part 3A Ceramiales. The Natural History Museunm, London is a small marine alga in the division Rhodophyta.
Description This alga consists of branched thalli growing to a length of 20 cm. It grows as tufts of very branched axes attached by rhizoids. A main branch is absent. In section the main branches can be seen to be composed of a central axis with 12 pericentral cells all of equal length. Trichoblasts are abundant.
Similar to Vertebrata fruticulosa (Boergeseniella fruticulosa) which it is distinguished by small corticated cells.
Habitat Growing on the seashore on pebbles and other surfaces at the very low water.
Distribution Ireland, Great Britain and north-west France.
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