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About: Polypodium appalachianum     Goto   Sponge   NotDistinct   Permalink

An Entity of Type : umbel-rc:Fern, within Data Space : dbpedia.demo.openlinksw.com associated with source document(s)

Type: yago:AirPlant113122985yago:Fern111545714yago:LivingThing100004258yago:Object100002684yago:Organism100004475yago:PhysicalEntity100001930yago:Plant100017222yago:Pteridophyte111545524yago:VascularPlant113083586yago:Whole100003553yago:WikicatEpiphytesyago:WikicatFernsOfTheUnitedStatesumbel-rc:Fern New Facet based on Instances of this Class

Polypodium appalachianum is a fern species native to eastern North America. Sometimes called the Appalachian polypody or Appalachian rockcap fern, it is very similar in appearance to Polypodium virginianum. For years, P. virginianum—long considered a variety of the British Polypodium vulgare—was recognized as having cryptic races, with diploid, triploid, and tetraploid representatives. Since the triploid specimens bore abortive spores, it was apparently the hybrid between the diploid and tetraploid groups. In 1991, it was resolved that the type of P. virginianum was the tetraploid series, and that it is an allotetraploid species of hybrid origin, with the diploid species as one parent. The diploid species was then named P. appalachianum. The other parent of P. virginianum was found to be .