Gymnocarpium robertianum (Hoffm.) Newm.
FamilyAspidiaceae — APG family: Cystopteridaceae
SynonymsNephrodium robertianum (Hoffm.) Prantl., Polypodium robertianum Hoffm., Lastrea robertiana (Hoffm.) Newm., Phaegopteris robertiana (Hoffm.) A. Braun, Dryopteris continentalis Petrov.
DescriptionSimilar to G. dryopteris; in typical specimens, fronds dull green, glandular below; two lateral divisions each smaller than terminal divisions; lowest pinnule on lower side of first lateral divisions considerably smaller than either pinna of third pair from base.
EcologyWoods. Described from Germany.
Hybrids with, and transitions to, G. dryopteris are common.
Hultén's Flora About

This is a digital representation of Eric Hultén’s ‘Flora of Alaska and Neighboring Territories: A Manual of the Vascular Plants’, which was published by Stanford University Press in 1968. The book was digitized by C. Webb (at UAMN) as part of the Flora of Alaska project, with funding by the US NSF (Grant 1759964 to Ickert-Bond & Webb), and with permission of Stanford University Press. Data and images © 1968 Board of Trustees of the Leland Stanford Jr. Univ. Usage licence: Creative Commons BY-NC-SA 4.0. NB: You may find OCR errors; please refer to the hard-copy if in doubt.