Jepson Flora Project: Jepson Interchange    

 
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Jepson Interchange (more information)
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  • Up-to-date information about California vascular plants is available from 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-ramosum L.

GREEN SPLEENWORT


Leaves 1-pinnate, generally few, clustered, 3–20 cm; petiole 2–5 cm, 0.5–1 mm wide, unwinged, red-brown at base, greenish or straw-colored above, dull; blade generally 8–12 mm wide, linear; 1° leaflets 8–15 pairs, 3–7 mm, 3–6 mm wide, ± diamond-shaped, generally shallowly crenate on upper, outer margins
Sporangia: sori generally 1–1.5 mm, generally 1–3 pairs per 1° leaflet
Chromosomes: 2n=72
Ecology: On rocks in limestone seams in metamorphic rocks
Elevation: 2050 m.
Bioregional distribution: n High Sierra Nevada (Sierra Co., eastern side of Sierra Buttes)
Distribution outside California: to Alaska, eastern N.America, Europe, Asia
Synonyms: A. viride Huds
See the CNPS Inventory for information about endangerment and rarity.
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bioregional map for ASPLENIUM%20trichomanes-ramosum being generated
 


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