| The oak ferns | |
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| Scientific classification | |
| Kingdom: | Plantae |
| Division: | Pteridophyta |
| Class: | Pteridopsida |
| Order: | Polypodiales |
| (unranked): | Eupolypods II |
| Family: | Cystopteridaceae |
| Genus: | Gymnocarpium Newm. 1851 |
| Species: | See text |
Gymnocarpium is a small genus of ferns once placed with various other groups, including the dryopteroid ferns and the athyrioid ferns. Cladistic analysis has demonstrated that Gymnocarpium and Cystopteris form a natural but relatively primitive clade that is basal to the asplenoid, thelypterioid, and athyrioid ferns comprehensively.
Gymnocarpium sori are small, round and naked. These ferns generally have a slender, creeping rhizome under the surface of the ground, and fairly thin-textured fronds.
Gymnocarpium Species
- Gymnocarpium appalachianum -- Appalachian oak fern
- Gymnocarpium brittonianum
- Gymnocarpium dryopteris -- oak fern, Eichenfarn
- Gymnocarpium fedtschenkoanum
- Gymnocarpium disjunctum
- Gymnocarpium jessoense -- western or Nahanni oak fern
- Gymnocarpium oyamense
- Gymnocarpium remotepinnatum
- Gymnocarpium robertianum -- limestone oak fern, Ruprechtsfarn
External links
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