Jepson eFlora: Taxon page
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Asplenium vespertinum

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 vespertinum Maxon
Leaf: 1-pinnate, many, clustered, 8--30 cm; stipe 1--5(8) cm, generally 0.5--1 mm wide, unwinged, dark red- to purple-brown, shiny; blade generally 1--2.5 cm wide, linear; pinnae 20--30 pairs, generally 5--12 mm, 2--8 mm wide, oblong, margin shallowly lobed or toothed +- throughout. Sporangia: sori generally 0.5--1.5 mm, generally 2--6 pairs per pinna.
Ecology: Base of overhanging boulders; Elevation: 200--1000 m. Bioregional Distribution: SCo, SnGb, PR (exc SnJt); Distribution Outside California: northern Baja California.
eFlora Treatment Author: Alan R. Smith
Jepson Online Interchange
Listed on CNPS Rare Plant Inventory

Previous taxon: Asplenium trichomanes subsp. trichomanes
Next taxon: Asplenium viride

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botanical illustration including Asplenium vespertinum


Citation for this treatment: Alan R. Smith 2016. Asplenium vespertinum, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on May 01, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora,, accessed on May 01, 2016.

Geographic subdivisions for Asplenium vespertinum:
SCo, SnGb, PR (exc SnJt);
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.
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.