Print Report

CEGL003313 Carex obnupta Wet Meadow

Type Concept Sentence: No Data Available


Common (Translated Scientific) Name: Slough Sedge Wet Meadow

Colloquial Name: No Data Available

Hierarchy Level:  Association

Type Concept: Habitats include isolated depressions with internal drainage, peatlands, shrub swamps, ancient marine terraces, and deflation plains. This association is heterogeneous and difficult to segregate into meaningful types. Stands range from species-rich assemblages to monotypes, and dense to depauperate stands, the latter with only bare mud or sphagnum between the plants. Tussocks may be 15 cm in diameter, closely spaced and 3-9 dm (1-3 feet tall), or 9 dm (3 feet) in diameter, 0.9-1.8 m (3-6 feet) apart and growing up to 1.8 m (6 feet) tall. Trees are mostly peripheral, and Alnus rubra and Fraxinus latifolia are the primary species but have low constancy and cover. Fourteen species of shrubs are reported, with Rubus ursinus having the highest constancy of only 11%. Other shrubs with significant patches include Rosa pisocarpa, Rosa gymnocarpa, and Corylus cornuta. More than 80 species have been recorded from the herb layer, Carex obnupta being most abundant with average cover of 66% and ranging from 20-99%. Other species in the herb layer with significant patches include Athyrium filix-femina, Nasturtium officinale, Oenanthe sarmentosa, Lysichiton americanus, Veronica americana, Carex exsiccata, Myosotis laxa, and Carex cusickii. The moss layer averages 34% cover and may range up to 95% cover, common species being both Eurhynchium praelongum and Sphagnum mendocinum. Some sites are old beaver swamps, cleared for pasture and then abandoned because they were too wet for livestock. Beaver subsequently reclaimed most of these sites. Elk and beaver use may be heavy.

Diagnostic Characteristics: No Data Available

Rationale for Nominal Species or Physiognomic Features: No Data Available

Classification Comments: No Data Available

Similar NVC Types: No Data Available
note: No Data Available

Physiognomy and Structure: No Data Available

Floristics: No Data Available

Dynamics:  No Data Available

Environmental Description:  No Data Available

Geographic Range: This association occurs from Oregon to British Columbia (Christy 2004).

Nations: CA,US

States/Provinces:  OR, WA




Confidence Level: Low

Confidence Level Comments: No Data Available

Grank: G4

Greasons: No Data Available


Concept Lineage: No Data Available

Predecessors: No Data Available

Obsolete Names: No Data Available

Obsolete Parents: No Data Available

Synonomy: = Carex obnupta (McCain and Christy 2005) [57 plots]
= Carex obnupta (Murray 2000)
? Carex obnupta (Sawyer et al. 2009) [45.183.01]
= Carex obnupta Association (Christy 2004)
= Carex obnupta Herbaceous Vegetation Association (Rocchio et al. 2012)
= Carex obnupta association (Stumpf et al. 2017)
? Carex obnupta community type (Kunze 1994)
= Carex obnupta Seasonally Flooded Herbaceous Vegetation (Christy et al. 1998)
> Marsh Community (Carex obnupta - Potentilla anserina) (Wiedemann 1966)

Concept Author(s): J.A. Christy (2004)

Author of Description: J.A. Christy (2004)

Acknowledgements: No Data Available

Version Date: 06-11-06

  • Boss, T. R. 1983. Vegetation ecology and net primary productivity of selected freshwater wetlands in Oregon. Ph.D. dissertation, Oregon State University, Corvallis. 236 pp.
  • Christy, J. A. 2001a. Low-elevation Sphagnum wetlands in western Oregon. Report to Environmental Protection Agency, Region 10. Oregon Natural Heritage Program, Portland. 90 pp.
  • Christy, J. A. 2004. Native freshwater wetland plant associations of northwestern Oregon. Oregon Natural Heritage Information Center, Oregon State University, Portland, OR.
  • Christy, J. A., J. S. Kagan, and A. M. Wiedemann. 1998. Plant associations of the Oregon Dunes National Recreation Area - Siuslaw National Forest, Oregon. Technical Paper R6-NR-ECOL-TP-09-98. USDA Forest Service, Pacific Northwest Region, Portland, OR. 196 pp.
  • Glad, J. B., R. Mishaga, and R. R. Halse. 1987. Habitat characteristics of Sidalcea nelsoniana Piper (Malvaceae) at Walker Flat, Yamhill County, Oregon. Northwest Science 61:257-263.
  • Kagan, J. S., E. M. Nielsen, M. D. Noone, J. C. van Warmerdam, L. K. Wise, G. Kittel, and C. Copass. 2012. Lewis and Clark National Historic Park vegetation classification and mapping project report. Natural Resource Report NPS/NCCN/NRR--2012/597. National Park Service, Fort Collins, CO.
  • Kagan, J. S., J. A. Christy, M. P. Murray, and J. A. Titus. 2004. Classification of native vegetation of Oregon. January 2004. Oregon Natural Heritage Information Center, Portland. 52 pp.
  • Kunze, L. M. 1994. Preliminary classification of native, low elevation, freshwater wetland vegetation in western Washington. Washington State Department of Natural Resources, Natural Heritage Program. 120 pp.
  • McCain, C., and J. A. Christy. 2005. Field guide to riparian plant communities in northwestern Oregon. Technical Paper R6-NR-ECOL-TP-01-05. USDA Forest Service, Pacific Northwest Region, Portland. 357 pp.
  • Murray, M. P. 2000. Wetland plant associations of the western hemlock zone in the central coastal and westslope Cascade Mountains. Unpublished report, Oregon Natural Heritage Program, Portland, OR. 82 pp. [http://www.natureserve.org/nhp/us/or/nw_or_wetlands.pdf]
  • Peck, M. E. 1919. Study of a section of the Oregon coast flora. Proceedings of the Iowa Academy of Sciences 26:337-362.
  • Ripley, J. D. 1983. Description of the plant communities and succession of the Oregon coast grasslands. Unpublished Ph.D. thesis, Oregon State University, Corvallis. 202 pp.
  • Rocchio, F. J., R. C. Crawford, and C. C. Thompson. 2012. San Juan Island National Historical Park vegetation classification and mapping project. Natural Resource Report NPS/NCCN/NRR--2012/603. National Park Service, Fort Collins, CO. 188 pp.
  • Sanville, W. D., H. P. Eilers, T. R. Boss, and T. G. Pfleeger. 1986. Environmental gradients in northwest freshwater wetlands. Environmental Management 10:125-134.
  • Sawyer, J. O., T. Keeler-Wolf, and J. Evens. 2009. A manual of California vegetation. Second edition. California Native Plant Society, Sacramento CA. 1300 pp.
  • Stumpf, K. A., Cogan Technology, and Kier Associates. 2017. Vegetation mapping and classification project: Redwood National and State Parks, California. Natural Resource Report NPS/REDW/NRR--2017/1431. National Park Service, Fort Collins, CO. 270 pp.
  • Taylor, D. W., and K. A. Teare. 1979a. Ecological survey of the vegetation of the proposed Trelorita Research Natural Area, Shasta-Trinity National Forest, Trinity County, California. Unpublished report. USDA Forest Service, Pacific Southwest Research Station, Berkeley, CA.
  • Titus, J. H., J. A. Christy, D. Vander Schaaf, J. S. Kagan, and E. R. Alverson. 1996. Native wetland, riparian, and upland plant communities and their biota in the Willamette Valley, Oregon. Report to the Environmental Protection Agency, Region X, Seattle, WA. Willamette Basin Geographic Initiative. Oregon Natural Heritage Program, The Nature Conservancy, Portland, OR.
  • WNHP [Washington Natural Heritage Program]. 2018. Unpublished data files. Washington Natural Heritage Program, Department of Natural Resources, Olympia, WA.
  • Western Ecology Working Group of NatureServe. No date. International Ecological Classification Standard: International Vegetation Classification. Terrestrial Vegetation. NatureServe, Boulder, CO.
  • Wiedemann, A. M. 1966. Contributions to the plant ecology of the Oregon coastal sand dunes. Ph.D. dissertation, Oregon State University, Corvallis. 255 pp.