Print Report

CEGL002081 Fraxinus pennsylvanica - Celtis occidentalis - Tilia americana - (Quercus macrocarpa) Floodplain Forest

Type Concept Sentence: No Data Available


Common (Translated Scientific) Name: Green Ash - Common Hackberry - American Basswood - (Bur Oak) Floodplain Forest

Colloquial Name: Green Ash - Elm - Mixed Lowland Hardwood Forest

Hierarchy Level:  Association

Type Concept: This ash - elm lowland hardwood forest community type is found in the northern tallgrass region of the midwestern United States. Stands occur in stream and river valleys, on low plateaus, and along lake margins. The sites often occur on terraces that flood only occasionally, and usually for just a few days in spring. They may have seasonally high (within the rooting zone) water tables, but these do not persist into the growing season. The mineral soils are deep, fertile, and moderately well-drained to poorly drained. This community is dominated by deciduous trees that can tolerate the saturated soil conditions. The tree canopy is typically closed, and often has a mixture of several tree species. Among the most abundant are Celtis occidentalis, Fraxinus pennsylvanica, and Tilia americana. Quercus macrocarpa is often abundant in the prairie-forest border region. Other common tree species include Acer saccharinum, Acer negundo, Ulmus americana, Betula papyrifera, and Populus tremuloides. The shrub layer is patchy and composed of both upland and lowland shrubs. The herbaceous layer contains a variety of herbs.

Diagnostic Characteristics: No Data Available

Rationale for Nominal Species or Physiognomic Features: No Data Available

Classification Comments: Ground layer composition of this type needs better characterization. In the northern tallgrass prairie region, this type concept overlaps with ~Tilia americana - (Quercus macrocarpa) / Ostrya virginiana Forest (CEGL002012)$$, but, unlike that type, this type is generally found on terraces within the floodplain. See also ~Fraxinus pennsylvanica - Ulmus americana - (Acer negundo, Tilia americana) Great Plains Floodplain Forest (CEGL005400)$$. A similar type is defined for stands in Missouri (~Fraxinus pennsylvanica - Celtis spp. - Quercus spp. - Platanus occidentalis Floodplain Forest (CEGL002410)$$).

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

Physiognomy and Structure: No Data Available

Floristics: This community is dominated by deciduous trees that can tolerate the saturated soil conditions. The tree canopy is typically closed and often has a mixture of several tree species. Among the most abundant are Celtis occidentalis, Fraxinus pennsylvanica, and Tilia americana. Quercus macrocarpa is often abundant in the prairie-forest border region. Other common tree species include Acer saccharinum, Acer negundo, Ulmus americana, Betula papyrifera, and Populus tremuloides. The shrub layer is patchy and composed of both upland and lowland shrubs. The herbaceous layer contains a variety of upland herbs (MNNHP 1993).

Dynamics:  No Data Available

Environmental Description:  This community is found in stream and river valleys, on low plateaus, and along lake margins. The sites often occur on terraces that flood only occasionally, and usually for just a few days in spring. They may have seasonally high (within the rooting zone) water tables, but these do not persist into the growing season. The mineral soils are deep, fertile, and moderately well-drained to poorly drained (Kurmis et al. 1986, MNNHP 1993, Minnesota DNR 2005b).

Geographic Range: This ash-elm lowland hardwood forest community type is found in the northern tallgrass region of the midwestern United States.

Nations: US

States/Provinces:  MN, ND, WI




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: = Fraxinus pennsylvanica - Celtis occidentalis - Tilia americana - (Quercus macrocarpa) Forest (Faber-Langendoen 2001)
= Ash-Elm-Trillium (Kurmis et al. 1986) [uncertain if equivalent]
= Lowland Hardwood Forest (MNNHP 1993)

Concept Author(s): D. Faber-Langendoen (2001)

Author of Description: J. Drake and D. Faber-Langendoen

Acknowledgements: No Data Available

Version Date: 06-24-13

  • Diamond, D. D., L. F. Elliott, M. D. DeBacker, K. M. James, D. L. Pursell, and A. Struckhoff. 2014. Vegetation mapping and classification of Pipestone National Monument, Minnesota: Project report. Natural Resource Report NPS/PIPE/NRR--2014/802. National Park Service, Fort Collins, CO. 79 pp.
  • Ewing, J. 1924. Plant successions of the brush-prairie in northwestern Minnesota. Journal of Ecology 12:238-265.
  • Faber-Langendoen, D., editor. 2001. Plant communities of the Midwest: Classification in an ecological context. Association for Biodiversity Information, Arlington, VA. 61 pp. plus appendix (705 pp.).
  • Kurmis, V., S. L. Webb, and L. C. Merriam. 1986. Plant communities of Voyageurs National Park, Minnesota, U.S.A. Canadian Journal of Botany 64:531-540.
  • MNNHP [Minnesota Natural Heritage Program]. 1993. Minnesota''s native vegetation: A key to natural communities. Version 1.5. Minnesota Department of Natural Resources, Natural Heritage Program, St. Paul, MN. 110 pp.
  • Midwestern Ecology Working Group of NatureServe. No date. International Ecological Classification Standard: International Vegetation Classification. Terrestrial Vegetation. NatureServe, Minneapolis, MN.
  • Minnesota DNR [Minnesota Department of Natural Resources]. 2003-2005a. Field guide to the native plant communities of Minnesota. Three volumes: The Laurentian Mixed Forest Province (2003), The Eastern Broadleaf Forest Province (2005c), The Prairie Parkland and Tallgrass Aspen Parklands provinces (2005b). Ecological Land Classification Program, Minnesota County Biological Survey, and Natural Heritage and Nongame Research Program. Minnesota Department of Natural Resources, St. Paul.
  • Minnesota DNR [Minnesota Department of Natural Resources]. 2005b. Field guide to the native plant communities of Minnesota: The Prairie Parkland and Tallgrass Aspen Parklands provinces. Ecological Land Classification Program, Minnesota County Biological Survey, and Natural Heritage and Nongame Research Program. Minnesota Department of Natural Resources, St. Paul.
  • NDNHI [North Dakota Natural Heritage Inventory]. 2018. Unpublished data. Vegetation classification of North Dakota. North Dakota Natural Heritage Inventory, North Dakota Parks & Recreation Department, Bismarck.
  • ONHIC [Ontario Natural Heritage Information Centre]. 2018. Unpublished data. Ontario Natural Heritage Information Centre, Ministry of Natural Resources, Ontario, Canada.
  • WDNR [Wisconsin Department of Natural Resources]. 2015. The ecological landscapes of Wisconsin: An assessment of ecological resources and a guide to planning sustainable management. PUB-SS-1131 2015. Wisconsin Department of Natural Resources, Madison. [http://dnr.wi.gov/topic/landscapes/Book.html]