. A popular description of the common Oregon ferns; contribution from the Herbarium of the University of Oregon. A POPULAR DESCRIPTION OF ee. Indusium shield-shaped,centrally attached. PolystichumPage 15. eee. Indusium convex, attachedby broad vase partly undersorus. FilixPage 15

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Keywords: ., bookcentury1900, bookdecade1910, bookidpopulardescr, bookyear1913