Asplenium trichomanes

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Maidenhair Spleenwort (Asplenium trichomanes): Small evergreen fern with ovate pinnae which is expected to occur, but seems to be less common than A. viride. Two subspecies indicated in FNA, with ssp. trichomanes expected in the southern half of the region (FNA map) on acidic substrates, while ssp. quadrivalens (which occurs on limestone) not thought to occur in the region (FNA map). However, most collections from Southeast Alaska have been made from limestone, so further investigation may be warranted.

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Other References

  • Muller: gen; cracks in wet rock
  • Hall 2010: Apparently rare among rock outcrops, crevices and talus slopes on islands in the central part of the region.

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