NVC community U19 (Thelypteris limbosperma - Blechnum spicant community) is one of the calcifugous grassland communities in the British National Vegetation Classification system.
The following constant species are found in this community: The Rare species Hymenophyllum wilsonii is known to be associated with the community.
This community is widespread but local in the uplands of Wales, England and Scotland.
An Illustrated Guide to British Upland Vegetation.
Joint Nature Conservation Committee.