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Key to families | Table of families and genera
Indexes to all accepted names and synonyms:
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Perennial herb, in soil or on or among rocks; rhizome creeping to erect, scaly. Leaf: generally all ± alike (or of 2 kinds, fertile, sterile), generally < 50 cm, often < 25 cm; stipe generally thin, wiry, often dark, ×-section with vascular strands generally 1–3, less often many in circle; blade generally pinnate or ± palmate-pinnate (see Adiantum), often >= 2-compound, abaxially often with glands, ± powdery exudate, hairs, or scales; segments round, oblong, fan-shaped, or other, veins generally free. Sporangia: in sori or not, marginal, submarginal, or along veins, covered by recurved, often modified segment margins (false indusia) or not; true indusia 0; spores spheric, sides flat or not, scar with 3 radiating branches.
± 40 genera, 500 species: worldwide, especially dry areas. [Windham 1993 FNANM 2:122–186] California members of Cheilanthes moved to the distantly related Myriopteris; Pellaea breweri to be moved as well, from a to-be-redefined Pellaea; traditional, often untenable limits of genera outside California also being clarified using molecular phylogenetics. —Scientific Editors: Alan R. Smith, Thomas J. Rosatti.
Key to Pteridaceae
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.Key to Adiantum
± 200 species: tropics, temperate. (Greek: unwettable) Widely cultivated.
Leaf: generally (7)20–40(50+) cm; stipe dark brown to ± black; blade 2–3-pinnate; pinnules cut or lobed often > 1/4 way to base, often with < 4 ± irregular lobes, margins at base converging at 45–90°, stipe color often extending gradually into base, midvein often part way along 1 margin. Sporangia: sori (and false indusia) (2)3–11 per pinnule, generally < 5 mm.
2n=60. Uncommon (or locally common). Shaded, rocky or moist banks, exposed sites or not; < 2000 m. North Coast Ranges, Cascade Range Foothills, n Sierra Nevada Foothills, s High Sierra Nevada, San Joaquin Valley, Central Coast, Outer South Coast Ranges, Southwestern California, Great Basin Floristic Province, Desert; generally southern United States; worldwide, especially temperate. Widely cultivated. [Online Interchange]
Previous taxon: Adiantum aleuticum
Next taxon: Adiantum jordanii
Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on Jul 3 2015
Citation for this treatment: [Author of taxon treatment] 2013. Adiantum, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=11947, accessed on Jul 3 2015
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© 2008 Neal Kramer
|Geographic subdivisions indicated for the distribution of Adiantum capillus-veneris|| Markers link to CCH specimen records. If the markers are obscured, reload the page [or change window size and reload]. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.
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(Note: any qualifiers in the taxon distribution description, such as 'northern', 'southern', 'adjacent' etc., are not reflected in the map above, and in some cases indication of a taxon in a subdivision is based on a single collection or author-verified occurence).
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