limestone fern
Gymnocarpium robertianum (Hoffm.) Newman

Gymnocarpium robertianum, known as the limestone fern, is a species in the fern family Cystopteridaceae. It was first described in 1851 and is native to a wide range of regions, including parts of North America, Europe, and Asia.
Description
Gymnocarpium robertianum is a fern species belonging to the Cystopteridaceae family. It is commonly referred to as the limestone fern and is distributed across Labrador, Newfoundland, Manitoba, New Brunswick, Ontario, Quebec, Saskatchewan, Flanders, SE, NO, Ciénaga de montaño, corregimiento de Montaño, Carmen del Darién, Belgium, Flemish Region, Walloon Region, Alaska, Albania, Algeria, Altay, Austria, and the Baltic States. This species was first published in 1851 and is part of the genus Gymnocarpium.
Other common names
limestone fernLimestone PolypodyRobert's oak fernlimestone oak fernnorthern oak fernscented oak fernscented oakfern
Distribution
Labrador · Newfoundland · Manitoba · New Brunswick · Ontario · Quebec · Saskatchewan · Flanders · SE · NO · Ciénaga de montaño, corregimiento de Montaño, Carmen del Darién · Belgium · Flemish Region · Walloon Region · Alaska · Albania · Algeria · Altay · Austria · Baltic States · Belarus · Bulgaria · Central European Rus · Corse · Czechoslovakia · East European Russia · Finland · France · Germany · Great Britain
Synonyms
Dryopteris obtusifoliaPolypodium obtusifoliumLastrea calcareaLastrea obtusifoliaGymnocarpium obtusifoliumDryopteris robertianaThelypteris robertianaPolypodium robertianumLastrea robertianaNephrodium robertianumGymnocarpium dryopteris var. pumilumPolypodium calcareumCarpogymnia robertianaCurrania robertianaPhegopteris robertianaAspidium robertianumPolypodium dryopteris var. robertianumAspidium calcareumPhegopteris calcareaPolypodium dryopteris var. calcareumGymnocarpium altaycumPhegopteris dryopteris var. robertianaCarpogymnia dryopteris var. pumilaPolypodium dryopteris var. pumilumDryopteris disjuncta subsp. calcareaLastrea dryopteris var. robertianaPhegopteris dryopteris subsp. calcareaPolypodium phegopteris var. calcareumPolypodium phegopteris var. robertianumPhegopteris dryopteris subsp. robertiana