Polypodium vulgare subsp. columbianum (Gilb.) Hult.
FamilyPolypodiaceae — APG family: Polypodiaceae
SynonymsPolypodium vulgare var. columbianum Gilb., Polypodium hesperinum Maxon.
DescriptionRhizome creeping, covered with dark-brown lanceolate scales; stipe shorter than blade; fronds yellowish-green, up to 20 cm tall, glabrous or with few scales; pinnae oblong to slightly obovate, rounded at apex, sometimes slightly crenate.
EcologyRocks, tree trunks. P. vulgare described from Europe, subsp. columbianum from “Columbia.”
Closely related to subsp. occidentale, but apparently restricted to interior of Alaska and very rare. Broken line on circumpolar map indicates range of P. vulgare races other than subsps. occidentale and columbianum.
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.