Jepson Flora Project: Jepson Interchange    

 
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Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California
For up-to-date information about California vascular plants, visit the Jepson eFlora.

ASPLENIACEAE

SPLEENWORT FAMILY

Alan R. Smith and Thomas Lemieux

Rhizome-scale cells with adjacent walls dark brown to blackish, external clear
Leaf: petiole in transverse 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: ± 10 genera (limits disputed), 650 species (most in Asplenium): worldwide, especially tropical.

ASPLENIUM

SPLEENWORT

Plants in soil or on rocks; rhizome generally short-creeping to erect
Leaves often tufted, generally glabrous; 1° axis often ± winged; blade simple or 1–many-pinnate, rarely forked; 1° leaflets often asymmetric, upward side more developed
Sporangia in linear sori; indusia persistent, covering sori when young, later reflexed
Etymology: (Greek: spleen)

Native

A. trichomanes L. subsp. trichomanes

MAIDENHAIR SPLEENWORT


Leaves 1-pinnate, many, clustered, 8–25 cm; petiole 1–3(5+) cm, 0.4–0.6 mm wide, narrowly winged, dark purple-brown, shiny; blade generally 0.5–1.5 cm wide, linear; 1° leaflets 20–30(37) pairs, 3–6(7) mm, 3 mm wide, oblong, generally shallowly crenate on upper, outer margins
Sporangia: sori generally 1–1.5 mm, generally 2–4 pairs per 1° leaflet
Chromosomes: 2n=72
Ecology: On rocks
Elevation: 200 m.
Bioregional distribution: nw Klamath Ranges (Del Norte Co.)
Distribution outside California: widespread in N.America, Europe, Asia, s temperate
See the CNPS Inventory for information about endangerment and rarity.
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bioregional map for ASPLENIUM%20trichomanes%20subsp.%20trichomanes being generated
 
YOU CAN HELP US make sure that our distributional information is correct and current. If you know that a plant occurs in a wild, reproducing state in a Jepson bioregion NOT highlighted on the map, please contact us with that information. Please realize that we cannot incorporate range extensions without access to a voucher specimen, which should (ultimately) be deposited in an herbarium. You can send the pressed, dried collection (with complete locality information indicated) to us (e-mail us for details) or refer us to an accessioned herbarium specimen. Non-occurrence of a plant in an indicated area is difficult to document, but we will especially value your input on those types of possible errors (see automatic conversion of distribution data to maps).

Retrieve Jepson Interchange Index to Plant Names entry for Asplenium trichomanes subsp. trichomanes
Retrieve dichotomous key for Asplenium
Overlay Consortium of California Herbaria specimen data by county on this map
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