. A popular description of the common Oregon ferns; contribution from the Herbarium of the University of Oregon. TUUJj:, A POPULAR DESCRIPTION OF ANALYTICAL KEY. A. Fronds distinctly of two kinds. B. Sporangia borne in clusters or spikes,b. Frond simple. OphioglossumPage 11 bb. Frond pennately divided orcompound. BotrychiumPage 11 BB. Sporangia borne on back ofmodified frond. b. Frond once pinnate or pinnatifid. StruthiopterisPage 11.

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Keywords: ., bookcentury1900, bookdecade1910, bookidpopulardescr, bookyear1913