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Thelypteris nevadensis
NEVADA MARSH FERN

Higher Taxonomy
Family: ThelypteridaceaeView Description 

Common Name: THELYPTERIS FAMILY
Habit: Plants generally in soil; rhizome short- to long-creeping, prostrate to erect, [trunk-like], scales generally hairy, +- brown. Leaf: stipe ×-section at base with 2 crescent-shaped vascular strands fusing into 1 U-shaped strand distally; blade 1[2]-pinnate, generally with needle-like, clear hairs on axes and/or between veins; rachis, costae generally grooved adaxially except between axes; veins free or in regular, net-like pattern. Sporangia: sori on veins, generally round; indusia reniform or round-reniform [0]; stalk cells in 3 rows; spores generally elliptic, scar generally linear.
Genera In Family: 1 genus (5--32 genera), +- 1000 species: worldwide, especially tropics; several cultivated.
eFlora Treatment Author: John C. Game, Alan R. Smith & Thomas Lemieux
Scientific Editor: Alan R. Smith, Thomas J. Rosatti.
Genus: ThelypterisView DescriptionDichotomous Key

Leaf: pinnae entire to generally deeply lobed, veins generally not forked.
Etymology: (Greek: female fern; ancient name for delicate fern)

Thelypteris nevadensis (Baker) C.V. Morton
NATIVE
Habit: Rhizome creeping, 1.5--3 mm wide; generally dormant in winter. Leaf: densely clustered, generally 40--100 cm, 8--15 cm wide; stipe scales ovate, tan, persistent; blade thin, abaxially with many short-stalked or sessile, resinous glands between and on veins, nonglandular hairs sparse on axes, veins, 0 between veins; pinnae deeply lobed, lobes +- oblong, entire to shallowly crenate. Sporangia: sori small, round; indusia hairs 0 or sparse.
Ecology: Springy hillsides, seepage areas; Elevation: 365--1700 m. Bioregional Distribution: KR, NCoRO, n SNH; Distribution Outside California: to British Columbia, Idaho. Note: Locally forming large colonies. Differs from Athyrium filix-femina in having longer, thinner rhizome, thinner leaves, more numerous reduced proximal pinnae, more entire lobes, rounder sori.
Synonyms: Lastrea oregana (C. Chr.) Copel.; Parathelypteris nevadensis (Baker) Holttum
eFlora Treatment Author: John C. Game, Alan R. Smith & Thomas Lemieux
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botanical illustration including Thelypteris nevadensis

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Citation for this treatment: John C. Game, Alan R. Smith & Thomas Lemieux 2016. Thelypteris nevadensis, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=46421, accessed on May 03, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on May 03, 2016.


Thelypteris nevadensis
click for enlargement
© 2013 Dana York
Thelypteris nevadensis
click for enlargement
© 2013 Dana York
Thelypteris nevadensis
click for enlargement
© 2013 Dana York
Thelypteris nevadensis
click for enlargement
© 2013 Dana York
Thelypteris nevadensis
click for enlargement
© 2013 Dana York

More photos of Thelypteris nevadensis in CalPhotos


Geographic subdivisions for Thelypteris nevadensis:
KR, NCoRO, n SNH;
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
(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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CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa.
Blue line denotes eFlora flowering time.