Polysiphonia stricta

Polysiphonia stricta is a small red marine alga in the Division Rhodophyta.

Polysiphonia stricta
Scientific classification
(unranked): Archaeplastida
Division: Rhodophyta
Class: Florideophyceae
Order: Ceramiales
Family: Rhodomelaceae
Genus: Polysiphonia
Species:
P. stricta
Binomial name
Polysiphonia stricta
(Dillwyn) Greville
Synonyms[1]
  • Conferva urceolata Lightfoot ex Dillwyn 1809
  • Conferva patens Dillwyn 1809
  • Conferva stricta Mertens ex Dillwyn 1804
  • Ceramium strictum (Mertens ex Dillwyn) Poiret 1811
  • Hutchinsia abyssina Lyngbye 1880
  • Hutchinsia comosa C.Agardh 1824
  • Hutchinsia roseola C.Agardh 1828
  • Hutchinsia stricta (Mertens ex Dillwyn) C.Agardh 1817
  • Hutchinsia urceolata (Lightfoot ex Dillwyn) Lyngbye 1819
  • Polysiphonia formosa Suhr 1831
  • Polysiphonia patens (Dillwyn) Harvey 1833
  • Polysiphonia pulvinata Liebmann 1845
  • Polysiphonia roseola (C.Agardh) Fries 1835
  • Polysiphonia spiralis L.Batten 1923
  • Polysiphonia urceolata (Lightfoot ex Dillwyn) Greville 1824
  • Polysiphonia urceolata f. comosa (C.Agardh) J.Agardh 1863
  • Polysiphonia urceolata f. formosa (Suhr) J.Agardh 1863
  • Polysiphonia urceolata f. pulvinata Kylin 1907
  • Polysiphonia urceolata f. roseola (C.Agardh) J.Agardh 1863
  • Polysiphonia urceolata f. typica Kjellman 1883

Polysiphonia stricta forms dense clumps of branching axes. The plants grow to 25 cm high.[2]

Description

P. stricta grows as small tufts of much branched tufts, growing to no more than 25 cm high.[2] The axes are erect, ecorticate, with 4 periaxial cells growing from prostrate axes. All 4 of the periaxial cells are of the same length.[2][3]

Reproduction

Spermatangial branchlets are formed in clusters at the apices. Cystocarps are on wide stalks and are urceolate. The tetraspores are in series in the final branches.[2]

Habitat

Epizoic and epiphytic in the low littoral to 20 m.[2]

Distribution

Found around the British Isles, the West Atlantic and American Atlantic.[2]

References
  1. M.D. Guiry in Guiry, M.D. & Guiry, G.M. 2018. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org/search/species/detail/?species_id=E4e1d55668c427064 ; searched on 19 August 2018.
  2. Seaweeds of the British Isles Volume 1 Rhodophyta Part 3A Ceramiales. The Natural History Museum, London. ISBN 0-11-310045-0
  3. Bunker, F.StP. D.,Brodie, J.A., Maggs, C.A. & Bunker, A.R. 2017. Seaweeds of Britain and Ireland. Second Edition. Wild Nature Press, Plymouth, UK. ISBN 978-0-9955673-3-7
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