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Adiantum jordanii
CALIFORNIA MAIDENHAIR

Higher Taxonomy
Family: PteridaceaeView DescriptionDichotomous Key

Common Name: BRAKE FAMILY
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.

Adiantum jordanii Müll. Hal.
NATIVE
Leaf: 20--50(70+) cm; stipe red-brown to +- black; blade 2--3-pinnate; pinnules cut or lobed often < 1/4 way to base, generally with < 4 +- irregular lobes, margins at base converging at 90--180(240)°, stipe color often ending +- abruptly at base, midvein forked into +- equal branches, not along margin. Sporangia: sori (and false indusia) 1--3(5) per pinnule, generally > 5 mm. Chromosomes: 2n=60.
Ecology: Shaded hillsides, moist woodland; Elevation: < 1200 m. Bioregional Distribution: CA-FP (exc uncommon or absent > 1200 m CaR, SNH); Distribution Outside California: Oregon, Baja California. Note: Cult; sterile hybrids with Adiantum aleuticum (Adiantum ×tracyi W.H. Wagner).
eFlora Treatment Author: Ruth E.B. Kirkpatrick, Alan R. Smith & Thomas Lemieux
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Citation for this treatment: Ruth E.B. Kirkpatrick, Alan R. Smith & Thomas Lemieux 2016. Adiantum jordanii, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=11955, accessed on February 13, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on February 13, 2016.


Adiantum jordanii
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© 2008 Keir Morse
Adiantum jordanii
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© 2005 George W. Hartwell
Adiantum jordanii
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© 2008 Keir Morse
Adiantum jordanii
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© 2015 Julie Kierstead Nelson
Adiantum jordanii
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© 2008 Keir Morse
Adiantum jordanii
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© 2010 Gary A. Monroe

More photos of Adiantum jordanii in CalPhotos


Geographic subdivisions for Adiantum jordanii:
CA-FP (exc uncommon or absent > 1200 m CaR, SNH);
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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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.
Blue line denotes eFlora flowering time.