Print Report

CEGL003329 Lilaeopsis occidentalis Mudflat

Type Concept Sentence: No Data Available


Common (Translated Scientific) Name: Western Grasswort Mudflat

Colloquial Name: No Data Available

Hierarchy Level:  Association

Type Concept: This community type appears limited to the Columbia River surge plain downriver from Longview, Washington. It occurs in protected areas on muds. It is an emergent community type subject to daily freshwater tidal inundation and is characterized by the codominance of Lilaeopsis occidentalis and Crassula aquatica. Other taxa include Callitriche spp., Elatine spp., Eleocharis acicularis, Eleocharis palustris, and Limosella aquatica.

Diagnostic Characteristics: No Data Available

Rationale for Nominal Species or Physiognomic Features: No Data Available

Classification Comments: Although Lilaeopsis occidentalis occurs as far upriver as Vancouver and Tillaea aquatica as far as Bonneville Dam, their co-occurrence is limited to the surge plain below Longview.

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

Physiognomy and Structure: No Data Available

Floristics: This is an emergent community type subject to daily freshwater tidal inundation and is characterized by the codominance of Lilaeopsis occidentalis and Crassula aquatica (= Tillaea aquatica). Other taxa include Callitriche spp., Elatine spp., Eleocharis acicularis, Eleocharis palustris, and Limosella aquatica.

Dynamics:  No Data Available

Environmental Description:  No Data Available

Geographic Range: No Data Available

Nations: CA?,US

States/Provinces:  BC?, OR, WA




Confidence Level: Low - Poorly Documented

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: = Lilaeopsis occidentalis - Tillaea aquatica community type (Kunze 1994) [(pp. 54, 97)]
= Lilaeopsis occidentalis (McCain and Christy 2005) [3 plots]

Concept Author(s): L.M. Kunze (1994)

Author of Description: L.M. Kunze (1994)

Acknowledgements: No Data Available

Version Date: 01-04-16

  • 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.
  • Christy, J. A., and J. A. Putera. 1993. Lower Columbia River Natural Area Inventory, 1992. Oregon Natural Heritage Program, Portland. 75 pp.
  • 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. 1984. Puget Trough coastal wetland sanctuaries: A summary report of recommended sites. Report to Washington Department of Ecology, Contract No. C-83061. Washington Natural Heritage Program, Washington Department of Natural Resources, Olympia.
  • 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.
  • 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.