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Porphyra umbilicalis
Scientific classification
Clade:	Archaeplastida
Division:	Rhodophyta
Class:	Bangiophyceae
Order:	Bangiales
Family:	Bangiaceae
Genus:	Porphyra
Species:	P. umbilicalis
Binomial name
Porphyra umbilicalis (L.) Kützing

Porphyra umbilicalis, commonly called "laver", is a species of seaweed in the genus Porphyra. It is smooth in texture and forms delicate, sheetlike thalli, reaching 25 centimetres (10 in) long and often clinging to rocks. Porphyra is classified as red algae; it tends to be a brownish colour, but boils down to a dark green pulp when prepared. It is unusual amongst seaweeds because the fronds are only one cell thick.

It is commonly found around the west coast of Great Britain and east coast of Ireland along the Irish Sea, where it is also known as "sleabhac" or "slake". It is edible and used to make laverbread.

See also

• Kathleen Mary Drew-Baker

References

1. ^ Francis-Baker, Tiffany (2021). Concise Foraging Guide. The Wildlife Trusts. London: Bloomsbury. p. 201. ISBN 978-1-4729-8474-6.
2. "Porphyra umbilicalis Kützing 1843". www.algaebase.org. Retrieved 2008-08-10.
3. "laverbread – WalesOnline". www.walesonline.co.uk. Retrieved 2008-08-10.
4. Wells, Emma (2010), A Field Guide to the British Seaweeds, National Marine Biological Analytical Quality Control Scheme (p 24) Archived 2012-03-27 at the Wayback Machine.
5. "British food seaweeds". Everything2. Retrieved 6 May 2012.
6. "Laver Seaweed – A Foraging Guide to Its Food, Medicine and Other Uses". eatweeds.co.uk. Retrieved 22 March 2021.

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• Taxa named by Friedrich Traugott Kützing
• Bangiophyceae
• Edible seaweeds
• Protists described in 1753
• Red algae species
• Rhodophyta stubs