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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.


Plant in soil or rock crevices; rhizome short-creeping, scales variously colored. Leaf: < ± 1 m; stipe cylindric, generally dark red-brown to ± black, shiny, ± scaly at base; blade 2–3-pinnate or ± palmate-pinnate (1st division ± palmate, subsequent ones pinnate), pinnae stalked, fan-shaped or oblong, generally lobed, toothed, or both; axes, blades lacking colored exudate. Sporangia: borne along veins on and covered by highly modified, recurved part of segment margin, appearing to run together at maturity; false indusia ± semicircular to linear; spores generally smooth, tan.
± 200 species: tropics, temperate. (Greek: unwettable) Widely cultivated.

Key to Adiantum

1. Leaf ± palmate-pinnate ..... A. aleuticum

1' Leaf 2–3-pinnate

2. Pinnules cut or lobed often > 1/4 way to base, margins at base converging at 45–90°, sori (and false indusia) (2)3–11, generally < 5 mm ..... A. capillus-veneris

2' Pinnules cut or lobed often < 1/4 way to base, margins at base converging at 90–180(240)°, sori (and false indusia) 1–3(5), generally > 5 mm ..... A. jordanii


Citation for the whole project: Jepson Flora Project (eds.) [year] Jepson eFlora, [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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