Common nameKillarney Bristle Fern Trichomanes speciosum © Natural History Museum Latin names ClassPteridopsida OrderHymenophyllales FamilyHymenophyllaceae GenusTrichomanes Speciesspeciosum Alternative Family nameTrichomanaceae Geographic details Habitatin crevices sheltered damp Soil typeacidic Distributionvery few W Britain; W Ireland NativeYes General Plant heightsmall BranchedNo Plant colourdeep green Habitupright lvs at intervals Conservation statusProtected Wikimedia Urlhttps://en.wikipedia.org/wiki/Trichomanes_speciosum Leaf details Separate fertile leavesNo Leaf shapeovate-lanceolate Pinnae2-3-pinnate WintergreenYes Spore details HomosporeYes Rhizome details Rhizome descriptionslender branching Rhizome scalesdark hair-like Rhizome positioncreeping Sori details Sori shapeflask Sori descriptionreceptacle protruding as bristle Sori placeedge of pinna segments Indusium details Indusium presentNo