Amauropelta nevadensis
(Baker) S.E. Fawcett & A.R. Smith
Sierra Nevada Marsh Fern
G4Apparently SecureGlobal Rank
Matt Berger, CC BY 4.0
Timothy McNitt, CC BY 4.0
Ed Alverson, CC BY 4.0
Trevor Van Loon, CC BY 4.0
Matt Berger, CC BY 4.0
Unknown, CC0 1.0
calibas, CC0 1.0
Ben Sims, CC0 1.0
Identity
Unique IDELEMENT_GLOBAL.2.153986
Element CodePPTHE050W0
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryVascular Plant
Endemicoccurs (regularly, as a native taxon) in multiple nations
KingdomPlantae
PhylumFilicinophyta
ClassFilicopsida
OrderFilicales
FamilyThelypteridaceae
GenusAmauropelta
Synonyms
Parathelypteris nevadensis(Baker) HolttumThelypteris nevadensis(Baker) Clute ex Morton
Other Common Names
Thélyptère de la Sierra Nevada (FR)
Concept Reference
Kartesz, J.T. 1994. A synonymized checklist of the vascular flora of the United States, Canada, and Greenland. 2nd edition. 2 vols. Timber Press, Portland, OR.
Taxonomic Comments
The generic placement of this taxon, in Amauropelta, is in accordance with the Pteridophyte Phylogeny Group I (2016) and is included as an accepted combination by Fawcett and Smith (2021). It was treated in the genus Thelypteris in the Flora of North America (vol. 2, 1993).
Conservation Status
Review Date2011-11-01
Change Date1985-09-09
Range Extent Comments
From foothills to middle altitudes in the mountains; Cascade Sierran region (chiefly the w. slope) from Mt. Rainier, Wash., to c. California, and approaching the coast in the Klamath region of sw. Oregon and nw. California.
Ecology & Habitat
Description
Delicate, pale green, deciduous fern emerging in a small compact clump from a slender rhizome. The leaves are few, erect to arching, 3-8 dm tall and quite narrow (max. ca 15 cm wide). Leaves are twice-pinnate (twice divided leaflets) with 35-40 opposite or offset leaflet pairs. The upper leaflets are larger and close together, the lower are greatly reduced in size and quite far apart. Spore clusters (sori) are covered by an inconspicuous, horseshoe-shaped cover (indusium) on leaflet undersides (Lorain 1989).
Diagnostic Characteristics
The fronds are distinctly narrower and more "delicate" than most of the similar fern species. T. nevadensis has strongly reduced and distant lower pinnae.
Habitat
Sierra wood-fern occurs along streambanks, springy places, and moist woods, from foothills to middle altitudes in the mountains.
Terrestrial Habitats
Forest/Woodland
Palustrine Habitats
Riparian
Other Nations (2)
CanadaN1
| Province | Rank | Native |
|---|---|---|
| British Columbia | S1 | Yes |
United StatesN4
| Province | Rank | Native |
|---|---|---|
| California | SNR | Yes |
| Washington | S4 | Yes |
| Idaho | S1 | Yes |
| Oregon | SNR | Yes |
Plant Characteristics
DurationPERENNIAL
Economic Value (Genus)No
Roadless Areas (14)
California (8)
| Area | Forest | Acres |
|---|---|---|
| Blue Creek Rare I | Six Rivers National Forest | 12,134 |
| Eagle | Shasta-Trinity National Forest | 6,553 |
| Kangaroo | Klamath National Forest | 40,617 |
| Russian | Klamath National Forest | 21,771 |
| Siskiyou | Klamath National Forest | 54,039 |
| Siskiyou B | Six Rivers National Forest | 18,871 |
| Snoozer | Klamath National Forest | 23,414 |
| Weaver Bally | Shasta-Trinity National Forest | 829 |
Idaho (1)
| Area | Forest | Acres |
|---|---|---|
| Bighorn - Weitas | Nez Perce-Clearwater National Forest | 254,845 |
Oregon (4)
| Area | Forest | Acres |
|---|---|---|
| Calf - Copeland Creek | Umpqua National Forest | 15,696 |
| Limpy Rock | Umpqua National Forest | 6,782 |
| Mclennon Mountain | Willamette National Forest | 8,085 |
| Opal Creek | Willamette National Forest | 5,417 |
Washington (1)
| Area | Forest | Acres |
|---|---|---|
| Glacier Peak B | Mt Baker-Snoqualmie National Forest | 19,328 |
References (11)
- Annable, C. R., and P. M. Peterson. 1988. Vascular plants of the Kettle Range, Ferry County, Washington. In: Plant Life of Washington State: Big Beaver Valley and the Kettle Range. Douglasia Occasional Papers, Volume 3, Part II. Washington Native Plant Society, University of Washington, Seattle.
- Caicco, S. L. 1987. National Natural Landmark evaluation. Aquarius proposed Research Natural Area (Idaho). Prepared for U. S. Department of the Interior, National Park Service, Seattle, WA. 24 pp. plus appendices.
- Fawcett, S., and A.R. Smith. 2021. A generic classification of the Thelypteridaceae. Sida, Bot. Misc. 59. BRIT Press, Fort Worth Botanic Garden, Botanical Research Institute of Texas, U.S.A. 102 pp.
- Flora of North America Editorial Committee (FNA). 1993a. Flora of North America north of Mexico. Vol. 2. Pteridophytes and gymnosperms. Oxford Univ. Press, New York. xvi + 475 pp.
- Graf, P. E. 1974. Successional stages of red alder in Bonner County, Idaho. Unpublished thesis, University of Idaho, Moscow. 146 pp.
- Hitchcock, C.L., A. Cronquist, M. Ownbey, and J.W. Thompson. 1969. Vascular plants of the Pacific Northwest. Part 1: Vascular cryptogams, gymnosperms, and monocotyledons. Univ. Washington Press, Seattle. 914 pp.
- Kartesz, J.T. 1994. A synonymized checklist of the vascular flora of the United States, Canada, and Greenland. 2nd edition. 2 vols. Timber Press, Portland, OR.
- Lorain, C. C. 1989. Field investigations of three Region 1 sensitive species on the Clearwater National Forest: <i>Asplenium trichomanes</i> (Maidenhair spleenwort), <i>Thelypteris nevadensis</i> (Sierra woodfern), and <i>Dodecatheon hendersonii </i>(Henderson's shooting star); plus new locations for additional sensitive species. Idaho Department of Fish and Game, Conservation Data Center, Boise. 19 pp. plus apendices.
- Lorain, C. C. 1991b. Action plan for sensitive plant species on the Clearwater National Forest. Unpublished report. 63 pp. plus appendices.
- Pteridophyte Phylogeny Group I. 2016. A Community-Derived Classification for Extant Lycophytes and Ferns. Journal of Systematics and Evolution 54(6): 563–603.
- Tyron, A., and R. Tyron. 1974. Geographic patterns in temperate American ferns and some relationships in <i>Thelypteris</i>. American Fern Journal 64(4): 99-104.