Polystichum aleuticum Christens.
FamilyAspidiaceae — APG family: Dryopteridaceae
DescriptionAbout 15 cm tall, with the general appearance of Woodsia alpina; rhizome oblique, fairly thick, dark brown, with thin brown scales and numerous chestnut- brown stipe bases; pinnae in about 15 pairs, sessile or short-petioled; sori at upper part of frond only; indusium orbicular or oblong, attached eccentrically, erose-laciniate, greenish, glabrous.
Known only from the type collection at Atka Island. Related to Chinese and Himalayan species—P. lachenénse (Hook.) Bedd. (Aspidium lachenense Hook.) and P. sinénse Christens.—but without close relatives in America.
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.