Dryopteris carthusiana

Tracheophyta PteropsidaDryopteridaceaeDryopterisDryopteris carthusiana


This deciduous fern is found in a range of damp habitats, including wet heaths, fens, mires, raised bogs, carr and wet woodland. It prefers rich alluvial soils with a high water table. More rarely it extends onto open moorland, possibly as a relic of former woodland. Generally lowland, but reaching 730 m in Atholl (E. Perth).



World Distribution

Eurosiberian Boreo-temperate element; also in N. America.

© P. Shannon

Broad Habitats

Broadleaved, mixed and yew woodland

Light (Ellenberg): 6

Moisture (Ellenberg): 8

Reaction (Ellenberg): 5

Nitrogen (Ellenberg): 4

Salt Tolerance (Ellenberg): 0

January Mean Temperature (Celsius): 3.3

July Mean Temperature (Celsius): 14.6

Annual Precipitation (mm): 1075

Height (cm): 80

Perennation - primary


Life Form - primary




Clonality - primary

Little or no vegetative spread

Clonality - secondary

Rhizome shortly creeping

Comment on Clonality

Indicated by CTW as shortly creeping; but more normally a single plant

Count of 10km squares in Great Britain: 1623

Count of 10km squares in Ireland: 313

Count of 10km squares in the Channel Isles: 0

Atlas Change Index: 1.06

Weighted Changed Factor: 16

Weighted Change Factor Confidence (90%)


JNCC Designations