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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.

Phaeoceros carolinianus - Carolina Hornwort

Range & Status

(syn. Phaeoceros laevis (L.) Prosk. subsp. carolinianus (Michx.) Prosk.). Occurs in C., N. and E. Europe, Iceland, Asia, Macaronesia, C. Africa and N. America. In Britain known only in the south, from Monmouth and Essex southwards, although probably under-recorded (Paton, 1999; Blackstock & Bosanquet, 2004).

Regional Distribution

Single record from S. of Penfound (SX29) in 1971. It has not been refound there on two subsequent visits.

Habitat & Ecology

Grows as an annual on moist or wet soil in arable fields and beside ditches. This species is monoicous and produces sporophytes that mature from September to December.


No information.



Click here to see Dr. David Holyoak's Bryophyte Flora for this species


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.