Dryopteris carthusiana
It is a tetraploid of hybrid origin, one parent being Dryopteris intermedia, known in North America as the intermediate wood fern, and an unknown, apparently extinct species dubbed Dryopteris semicristata, which is also the presumed parent of the hybrid-origin Dryopteris cristata.
Lat: 52.30, Long: 5.13
Spotted on Apr 28, 2012
Submitted on Apr 28, 2012
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