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Key to families | Table of families and genera
Specimen numbers are hyperlinked to records in the Consortium of California Herbaria data view where possible. Taxa are hyperlinked to entries in the Jepson Interchange via the "[Online Interchange]" link.
Rhizome short-creeping or ascending to suberect, stout. Leaf: stipe > 1.5 mm wide, firm, more densely scaly than midrib, base ×-section with many round vascular strands in an arc; blade >= 1–3-pinnate, proximal pinnae reduced or not, veins free, simple or forked; segments deeply pinnately lobed or not. Sporangia: sori round; indusium round-reniform, ± centrally attached at a sinus, generally persistent.
± 100 species: ± worldwide, especially eastern Asia. (Greek: oak, fern) Hybrids unknown in California, frequent in eastern North America.
Unabridged references: [Montgomery & Paulton 1981 Fiddlehead Forum 8:25–31]
1. Leaf ± 3-pinnate, proximal pinnae > others, sides strongly unequal ..... D. expansa
1' Leaf 1–2-pinnate, proximal pinnae <= others, sides ± equal
2. Stipe generally > 1/3 leaf length; longest pinnae generally near blade base; veins into segment teeth, adaxially obscure; scales of pinna midribs lance-ovate to lanceolate; blade, indusial glands sparse to ± dense; blades thick; Northwestern California, Sierra Nevada, Sacramento Valley, Central Western California, Southwestern California, Modoc Plateau, s Mojave Desert ..... D. arguta
2' Stipe generally <= 1/3 leaf length; longest pinnae generally near blade middle; veins generally not into segment teeth, adaxially ± widened, prominent at tip; scales of pinna midribs hair-like, linear; blade, indusial glands generally 0 or very sparse; blades thin; San Bernardino Mountains, White and Inyo Mountains ..... D. filix-mas
Citation for the whole project: Jepson Flora Project (eds.) [year] Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html [accessed on month, day, year]
Citation for an individual treatment: [Author of taxon treatment] [year]. [Taxon name] in Jepson Flora Project (eds.) Jepson eFlora, [URL for treatment]. Accessed on [month, day, year].
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