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Vascular Plants of California
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Adiantum aleuticum

Higher Taxonomy
Family: PteridaceaeView DescriptionDichotomous Key
Habit: 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.
Genera In Family: +- 40 genera, 500 species: worldwide, especially dry areas. Note: CA 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 CA also being clarified using molecular phylogenetics.
eFlora Treatment Author: Ruth E.B. Kirkpatrick, Alan R. Smith & Thomas Lemieux, except as noted
Scientific Editor: Alan R. Smith, Thomas J. Rosatti.
Genus: AdiantumView DescriptionDichotomous Key

Habit: 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.
Species In Genus: +- 200 species: tropics, temperate. Etymology: (Greek: unwettable) Note: Widely cultivated.
eFlora Treatment Author: Layne Huiet, Ruth E.B. Kirkpatrick, Alan R. Smith & Thomas Lemieux
Reference: [Huiet et al. 2015 PhytoKeys 53:73--81]
Adiantum aleuticum (Rupr.) C.A. Paris
Leaf: 20--75(100+) cm; stipe red-brown to +- black; blade +- palmate-pinnate; pinnules cut or lobed generally < 1/2 way to midrib, often with > 4 regular lobes, margins at base converging at 45--90°, stipe color extending gradually into base, midvein generally part way along 1 margin. Sporangia: sori (and false indusia) generally 4--6 per pinnule, generally < 3 mm. Chromosomes: 2n=58.
Ecology: Shady, moist banks, streamsides, serpentine; Elevation: < 3400 m. Bioregional Distribution: 2/3NW, CaR, SNH, CCo, SnFrB, SCoRO, n ChI, TR, SnJt; Distribution Outside California: to Alaska, western Canada, Montana, Colorado, New Mexico; eastern United States, adjacent Can, northwestern Mexico. Note: Sterile hybrids with Adiantum jordanii (Adiantum ×tracyi W.H. Wagner).
Synonyms: Adiantum pedatum L. subsp. calderi Cody; Adiantum pedatum var. subpumilum W.H. Wagner; Adiantum boreale C. Presl nom. nud.; Adiantum pedatum var. aleuticum Rupr.
Jepson eFlora Author: Layne Huiet, Ruth E.B. Kirkpatrick, Alan R. Smith & Thomas Lemieux
Reference: [Huiet et al. 2015 PhytoKeys 53:73--81]
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Botanical illustration including Adiantum aleuticum

botanical illustration including Adiantum aleuticum


Citation for this treatment: Layne Huiet, Ruth E.B. Kirkpatrick, Alan R. Smith & Thomas Lemieux 2016, Adiantum aleuticum, in Jepson Flora Project (eds.) Jepson eFlora, Revision 4,, accessed on March 23, 2019.

Citation for the whole project: Jepson Flora Project (eds.) 2019, Jepson eFlora,, accessed on March 23, 2019.

Adiantum aleuticum
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© 2016 Neal Kramer
Adiantum aleuticum
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© 2015 Aaron E. Sims and CNPS
Adiantum aleuticum
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© 2013 Barry Rice
Adiantum aleuticum
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© 2018 Neal Kramer
Adiantum aleuticum
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© 2008 Keir Morse
Adiantum aleuticum
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© 2008 Keir Morse

More photos of Adiantum aleuticum in CalPhotos

Geographic subdivisions for Adiantum aleuticum:
2/3NW, CaR, SNH, CCo, SnFrB, SCoRO, n ChI, TR, SnJt;
Markers link to CCH specimen records. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues. Purple markers indicate specimens collected from a garden, greenhouse, or other non-wild location.
map of distribution 1
(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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Data provided by the participants of the Consortium of California Herbaria.
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CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa, if there are more than 1 infraspecific taxon in CA.
Blue line denotes eFlora flowering time.