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ASPLENIACEAE SPLEENWORT FAMILY

Alan R. Smith

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.
1 or 2 genera (most segregates now subsumed in Asplenium), 700 species: worldwide, especially tropics. —Scientific Editor: Thomas J. Rosatti.

ASPLENIUM SPLEENWORT
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. (Greek: spleen)

Key to Asplenium

A. vespertinum Maxon WESTERN SPLEENWORT
NATIVE
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.
Base of overhanging boulders; 200–1000 m. South Coast, San Gabriel Mountains, Peninsular Ranges (except San Jacinto Mountains); northern Baja California. [Online Interchange] {CNPS list}

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

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Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on Jul 25 2014
Citation for this treatment: [Author of taxon treatment] 2013. Asplenium, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=14615, accessed on Jul 25 2014

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Bioregions in which Asplenium vespertinum occurs 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
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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.