Flora of Northern Ireland
  • Asplenium trichomanes ssp trichomanes - spleenwort - Aspleniaceae
Asplenium trichomanes ssp trichomanes
© Graham Day
Asplenium trichomanes ssp trichomanes
(Map updated: March 2008)

Nearly all plants of Asplenium trichomanes encountered in Ireland will be the tetraploid subspecies quadrivalens, which is very abundant. The diploid subspecies trichomanes is generally smaller (although stunted forms of subsp. quadrivalens can be of similar size) and the spores are smaller when measured under the microscope. It is a much rarer plant, being currently known only from two sites within Northern Ireland, both are on shale rock outcrops in the Mourne Mountains. Two other sites occur in the Republic of Ireland.

All names: Asplenium trichomanes ssp. trichomanes