Limestone fern (Gymnocarpium robertianum)

Limestone Fern (Gymnocarpum robertianum), another nationally scarce plant, is also found here on limestone scree.

Plants including rigid buckler fern, angular Solomon's seal, limestone fern, and dark red helleborine are to be found on the pavement.

Also to be found are Lesser Meadow-rue, Goldenrod, Scabious and Bloody Crane's-bill with, to a lesser extent, Mountain Melick, Limestone Fern, Wood Crane's-bill and Melancholy Thistle, Green Spleenwort, Wall Lettuce and Hairy Stonecrop.

Gymnocarpium robertianum has small (10-50cm), deltate, two to three pinnate fronds.

Fern walls - brick walls with Gymnocarpium robertianum.

Limestone fern (Gymnocarpium robertianum)

Gymnocarpium robertianum (limestone oak fern or scented oak fern) is a fern of the family Woodsiaceae.

The rare Limestone Oak Fern Gymnocarpium robertianum and Rigid Buckler-Fern Dryopteris submontana have also been recorded here.

British NVC community OV38 (Gymnocarpium robertianum - Arrhenatherum elatius community) is one of the open habitat communities in the British National Vegetation Classification system.

Fern collections include Adiantum pedatum, Asplenium scolopendrium, Athyrium filix-femina, Blechnum spicant, Dryopteris affinis, Gymnocarpium robertianum, Matteuccia struthiopteris, Phegopteris connectilis, Phyllitis scolopendrium, and Woodsia obtusa.