Jepson eFlora: Taxon page
Vascular Plants of California
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Asplenium trichomanes subsp. trichomanes

Higher Taxonomy
Family: AspleniaceaeView Description 
Habit: Rhizome-scale cells with lateral walls dark brown to +- black, surficial walls clear. Leaf: stipe ×-section with 1 X-shaped or 2 back-to-back C-shaped vascular strands; segment veins generally free. Sporangia: in linear [to oblong] sori along veins; indusia linear, opening away from veins; stalk cells in 1 row; spores elliptic, winged.
Genera In Family: 1 or 2 genera (most segregates now subsumed in Asplenium), 700 species: worldwide, especially tropics.
eFlora Treatment Author: Alan R. Smith
Scientific Editor: Thomas J. Rosatti.
Genus: AspleniumView DescriptionDichotomous Key

Habit: Plant in soil or on rocks; rhizome generally short-creeping to erect. Leaf: often tufted, generally glabrous; rachis often +- winged; blade simple or 1[many]-pinnate or forked; pinnae often more developed acroscopically, often without obvious midrib. Sporangia: indusia persistent, covering sori when young, later reflexed.
Etymology: (Greek: spleen)
Asplenium trichomanes L. subsp. trichomanes
Leaf: 1-pinnate, many, clustered, 8--25 cm; stipe 1--3(5+) cm, 0.4--0.6 mm wide, narrowly winged adaxially, dark purple-brown, shiny; blade generally 0.5--1.5 cm wide, linear; pinnae 15--30(37) pairs, 3--6(7) mm, 2--3 mm wide, oblong, generally shallowly crenate on acroscopic and distal margins. Sporangia: sori generally 1--1.5 mm, generally 2--4 pairs per pinna. Chromosomes: 2n=72.
Ecology: On rocks; Elevation: 200 m. Bioregional Distribution: nw KR (Del Norte Co.); Distribution Outside California: widespread in North America, Europe, Asia, southern temperate.
Jepson eFlora Author: Alan R. Smith
Index of California Plant Names (ICPN; linked via the Jepson Online Interchange)
Listed on CNPS Rare Plant Inventory

Previous taxon: Asplenium septentrionale
Next taxon: Asplenium vespertinum

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Botanical illustration including Asplenium trichomanes subsp. trichomanes

botanical illustration including Asplenium trichomanes subsp. trichomanes


Citation for this treatment: Alan R. Smith 2012, Asplenium trichomanes subsp. trichomanes, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on January 31, 2023.

Citation for the whole project: Jepson Flora Project (eds.) 2023, Jepson eFlora,, accessed on January 31, 2023.

Asplenium trichomanes subsp. trichomanes
click for enlargement
© 2012 Dana York
Asplenium trichomanes subsp. trichomanes
click for enlargement
© 2012 Dana York
Asplenium trichomanes subsp. trichomanes
click for enlargement
© 2012 Dana York
Asplenium trichomanes subsp. trichomanes
click for enlargement
© 2013 Dana York

More photos of Asplenium trichomanes subsp. trichomanes in CalPhotos

Geographic subdivisions for Asplenium trichomanes subsp. trichomanes:
nw KR (Del Norte Co.)
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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).


Data provided by the participants of the  Consortium of California Herbaria.
View all CCH records
All markers link to CCH specimen records. The original determination is shown in the popup window.
Blue markers indicate specimens that map to one of the expected Jepson geographic subdivisions (see left map). Purple markers indicate specimens collected from a garden, greenhouse, or other non-wild location.
Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.

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 (fruiting time in some monocot genera).