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Asplenium ruta-muraria

This evergreen fern grows almost exclusively on vertical
surfaces. The undergrond needs to be calcareous rocks or
a mossy limestone cliff and between the stones of walls.

Wall-rue or Asplenium ruta-muraria

There are a few sporecases on the undersides of the thick leaflets.
Ripe spore cases (sori) are brown colored.
When the spores are not ripe they are covered
with a veil (indusium). The veil breaks and
releases the spores, spread by the wind.
This happens during summertime until the mid
of the fall.

    Wall-rue on a old chalcky wall in Gent. This fern is often
    seen together with the Ivy-leaved toadflax on dry walls.

    Wall-rue together with the Maidenhair spleenwort

    Ferns on walls

    Wall fern, Tongue fern and Maidenhair spleenwort are
    evergreen ferns that often grow on old walls.
    The Wall fern grows on dry walls and is often
    the first plant on that wall.
    Tongue fern and Maidenhair spleenwort prefer moist
    walls facing North.
    These three evergreen ferns are vulnerable for
    frost periods.

    Growing on a wall

    These plants grow on chalcky old walls.

    Wall-rue (Asplenium ruta-muraria)
    Maidenhair spleenwort (Asplenium trichomanes)
    Tongue fern (Asplenium scoloendrium)
    Red valerian (Centranthus ruber)
    Sticky Hornweed (Cerastium glomeratum)
    Kenilworth Ivy (Cymbalaria muralis)
    Fleabane (Erigeron karvinskianus)
    Herb Robert (Geranium robertianum)
    Purple Toadflax (Linaria purpurea)
    Sweet Alyssum (Lobularia maritima)
    Wall pepper (sedum acre)
    wall lettuce (Mycelis muralis)
    sticky-weed (Parietaria judaica)
    Red valerian
    Yellow Corydalis (Pseudofumaria lutea)
    Sempervivum (sempervivum)
    Wallflower (Erysimum cheiri)

    (Grimmia pulvinata)
    Rough-stalked feather-moss (Brachythecium rutabulum)

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