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Dryopteris intermedia, the intermediate wood fern or evergreen wood fern, [4] [3] is a perennial, evergreen wood fern native to eastern North America. It is a diploid species, and is the parent of several species of hybrid origin, including Dryopteris carthusiana .
Hybridization and polyploidy are common phenomena in ferns, and the genus Dryopteris is known to be one of the most freely-hybridizing fern genera. [1] North American botanists recognized early that there were close relationships between many of the species of Dryopteris on the continent, and that these relationships reflected hybrid ancestry. [2]
Dryopteris / d r aɪ ˈ ɒ p t ə r ɪ s /, [2] commonly called the wood ferns, male ferns (referring in particular to Dryopteris filix-mas), or buckler ferns, is a fern genus in the family Dryopteridaceae, subfamily Dryopteridoideae, according to the Pteridophyte Phylogeny Group classification of 2016 (PPG I). [3]
Dryopteris clintoniana, commonly known as Clinton's wood fern, is a fern of hybrid origin native to the northern hemisphere. It is a fertile hexaploid, arising as a species by doubling of its chromosome number from a hybrid between Dryopteris cristata , a tetraploid, and Dryopteris goldieana , a diploid.
They are known colloquially as the wood ferns. In the Pteridophyte Phylogeny Group classification of 2016 (PPG I), the family is placed in the suborder Polypodiineae . [ 1 ] Alternatively, it may be treated as the subfamily Dryopteridoideae of a very broadly defined family Polypodiaceae sensu lato .
Log fern: Northwestern Georgia G4 - apparently secure: Dryopteridaceae: Dryopteris cristata [1]: 13 Crested wood fern: Fulton county G5 - secure: Dryopteridaceae: Dryopteris goldieana [1]: 13 Goldie's wood fern, Giant wood fern: Northeastern mountain counties G4 - apparently secure: Dryopteridaceae: Dryopteris intermedia [1]: 14
Dryopteris ludoviciana, the southern woodfern, [2] is fern native to southern United States from Florida west to Texas and as far north as Kentucky and North Carolina. It is an evergreen in mild climates. Its growth habit is tall and upright with shiny and leathery dark green fronds. It will tolerate dry conditions but will perform best in ...
Dryopteris campyloptera, also known as the mountain wood fern, is a large American fern of higher elevations and latitudes. It was formerly known as Dryopteris spinulosa var. americana . This species also has been mistakenly referred to as D. austriaca and D. dilatata .