Polypodium vulgare subsp. occidentale (Hook.) Hult.
FamilyPolypodiaceae — APG family: Polypodiaceae
SynonymsPolypodium occidentale Maxon, Polypodium vulgare var. occidentale Hook., Polypodium glycyrrhiza D. C. Eat.
DescriptionSimilar to subsp. columbianum, but fronds generally taller (esp. in southern specimens), grayish-green; midrib of frond and segments sparsely pubescent, with crisp gray or brownish hairs, segments with more or less acute segments.
EcologyRocks, tree trunks. Subsp. occidentale described from Sitka and Columbia River.
Most specimens have subacute leaves (var. commune Milde), but specimens with lanceolate, acute segments (var. occidentale Hook.) also occur, esp. south- ward.
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.