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|Jepson eFlora: Taxon page
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|Family: Woodsiaceae||View Description||Dichotomous Key|
|Genus: Woodsia||View Description||Dichotomous Key|
|Species:||View Description||Dichotomous Key|
Woodsia oregana D.C. Eaton
Leaf: 5--25 cm, 1--3.5 cm wide, tip +- acute, unforked; hairs on abaxial leaf axes 0 or +- 0.1 mm, cylindric, non-segmented, glandular; pinnae 0.5--2.5 cm, 0.3--1.3 cm wide, pinnately lobed to 1-pinnate, margin fine-toothed. Sporangia: indusium of segmented hairs. Chromosomes: 2n=76,152.
Ecology: Crevices, rock bases; Elevation: 900--2800 m. Bioregional Distribution: KR, CaRH, n&s SNH, SnBr, PR, MP, W&I, DMtns; Distribution Outside California: to British Columbia, eastern Canada, northern United States, Oklahoma, Arizona. Note: Variable. Sterile, nonglandular plants distinguished from Cystopteris fragilis by leaf veins that do not quite reach the margin in Woodsia but do in Cystopteris. If recognized taxonomically, plants differing in chromosome number, spore size [Windham 1993], perhaps other ways, assignable to W. oregana subsp. cathcartiana (B.L. Rob.) Windham (2n = 152), W. oregana subsp. oregana (2n = 76); study needed.
Unabridged Note: Variable. Like Cystopteris fragilis except glandular hairs generally present in Woodsia, absent in Cystopteris; veins ending just before leaf margin in Woodsia at 10×, at leaf margin in Cystopteris.
eFlora Treatment Author: John C. Game, Alan R. Smith and Thomas Lemieux
Jepson Online Interchange
Previous taxon: Woodsia
Next taxon: Woodsia plummerae
Citation for this treatment: John C. Game, Alan R. Smith and Thomas Lemieux 2016. Woodsia oregana, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=48612, accessed on August 31, 2016.
Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on August 31, 2016.