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Vascular Plants of California
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Adiantum shastense
SHASTA 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.
eFlora Treatment Author: Layne Huiet, Ruth E.B. Kirkpatrick, Alan R. Smith & Thomas Lemieux
Reference: [Huiet et al. 2015 PhytoKeys 53:73--81]
Adiantum shastense Huiet & A.R. Sm.
NATIVE
Leaf: (18)30--60 cm; stipe red-brown to +- black; blade 2--3-pinnate; pinnules sometimes cut < 1/4 way to base, more common in sterile pinnules, margins at base 90--135°, sterile pinnules more incised than the fertile, dark stalk color passing slightly into base of ultimate segments. Sporangia: sori (and false indusia) 2--7 per pinnule, < 4 mm, with yellowish exudate among sporangia. Chromosomes: 2n=60.
Ecology: Shaded forests, rocky or moist banks, northern or eastern exposures; Elevation: < 1600 m. Bioregional Distribution: KR. Note: Described since TJM2.
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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Citation for this treatment: Layne Huiet, Ruth E.B. Kirkpatrick, Alan R. Smith & Thomas Lemieux 2016, Adiantum shastense, in Jepson Flora Project (eds.) Jepson eFlora, Revision 4, http://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=100476, accessed on May 21, 2019.

Citation for the whole project: Jepson Flora Project (eds.) 2019, Jepson eFlora, http://ucjeps.berkeley.edu/eflora/, accessed on May 21, 2019.

Adiantum shastense
click for enlargement
© 2015 Len Lindstrand III
Adiantum shastense
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© 2016 Steve Matson
Adiantum shastense
click for enlargement
© 2009 Julie Kierstead Nelson
Adiantum shastense
click for enlargement
© 2015 Len Lindstrand III
Adiantum shastense
click for enlargement
© 2009 Julie Kierstead Nelson
Adiantum shastense
click for enlargement
© 2015 Julie Kierstead Nelson

More photos of Adiantum shastense in CalPhotos



Geographic subdivisions for Adiantum shastense:
KR.
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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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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.