Cornish Biodiversity Network  -  Supporting Wildlife Recording

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Cornish Red Data (2009)

The descriptive text, below the map, is from the Cornish Red Data Book (2009). The map on this web page depicts the organisms distribution and shows the records made pre-2000 and those made since.

Euphorbia hyberna - Irish Spurge

Range & Status

Native; Widespread in southern Ireland, and extremely rare and local in Cornwall, Devon and Somerset.

Regional Distribution

Recorded from one site near Portreath (SW64), a SSSI, where it has been known since 1884.

Habitat & Ecology

A small population occurs in a shady, formerly coppiced, oak woodland. It grows in a small area of the woodland, on a north-facing slope, close to paths, with some plants growing on a Cornish Hedge within the wood. It requires an open ground layer.


Can be overgrown by Bramble Rubus fruticosus agg. and Honeysuckle Lonicera

periclymenum . A lack of coppicing may threaten its long-term survival.


Nothing practical has been done for decades apart from repeated monitoring surveys.

Click here to see Aphotoflora images by David Fenwick


I.J. Bennallick, S. Board, C.N. French, P.A. Gainey, C. Neil, R. Parslow, A. Spalding and P.E. Tompsett. eds. 2009. Red Data Book for Cornwall and the Isles of Scilly. 2nd Edition.Croceago Press.

The Cornish Red Data Book Project was led by the Cornwall and Isles of Scilly Federation for Biological Recorders (CISFBR). The full text and species accounts (minus the maps) are available on the CISFBR website.

Cornish Biodiversity Network. 2017.