Print Report

A3680 Fraxinus pennsylvanica - Carya illinoinensis - Quercus macrocarpa Great Plains Floodplain Forest Alliance

Type Concept Sentence: These forests are primarily dominated by Carya illinoinensis, Fraxinus pennsylvanica, Quercus macrocarpa, Quercus muehlenbergii, and Ulmus americana, and are found in floodplain forests from the East-Central Texas Plains, Texas Blackland Prairie regions, Crosstimbers, and the southeastern edge of the Central Great Plains, including the eastern Edwards Plateau and the Lampasas Cutplain.


Common (Translated Scientific) Name: Green Ash - Pecan - Bur Oak Great Plains Floodplain Forest Alliance

Colloquial Name: Great Plains Green Ash - Pecan - Bur Oak Floodplain Forest

Hierarchy Level:  Alliance

Type Concept: These forests are primarily dominated by Carya illinoinensis, Celtis laevigata, Celtis occidentalis, Fraxinus pennsylvanica, Quercus macrocarpa, Quercus muehlenbergii, Ulmus americana, and Ulmus rubra. Examples also contain the trees Carya aquatica and Fraxinus pennsylvanica; the shrubs Cornus drummondii, Forestiera acuminata, and Frangula caroliniana; and the grass Phanopyrum gymnocarpon. This alliance is defined partly by its floristic composition and partly by its biogeographic setting. This biogeographic setting is well west of the distribution of some taxa that are dominant constituents of related forests in the more humid Southeast. It is well understood that floodplain taxa extend their ranges west into otherwise inhospitable regions along major watercourses and their major tributaries. Stands are found in floodplain forests from the East-Central Texas Plains, Texas Blackland Prairie regions, Crosstimbers, and the southeastern edge of the Central Great Plains, including the eastern Edwards Plateau and the Lampasas Cutplain.

Diagnostic Characteristics: These are floodplain forests of east-central Texas and related regions primarily dominated by Fraxinus pennsylvanica, Carya illinoinensis, Ulmus americana, and Quercus species, including Quercus macrocarpa and Quercus muehlenbergii. This alliance is defined partly by its floristic composition and partly by its biogeographic setting. This biogeographic setting is well west of the distribution of some taxa that are dominant constituents of related forests in the more humid Southeast. It is well understood that floodplain taxa extend their ranges west into otherwise inhospitable regions along major watercourses and their major tributaries.

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: These floodplain forests are primarily dominated by Carya illinoinensis, Celtis laevigata, Celtis occidentalis, Fraxinus pennsylvanica, Quercus macrocarpa, Quercus muehlenbergii, Ulmus americana, and Ulmus rubra. Examples also contain the trees Carya aquatica and Fraxinus pennsylvanica; the shrubs Cornus drummondii, Forestiera acuminata, and Frangula caroliniana; and the grass Phanopyrum gymnocarpon.

Dynamics:  No Data Available

Environmental Description:  These forests occur on nearly level floodplains and terraces along large rivers and major streams, as well as along small and intermittent streams in Oklahoma and Texas, in the East-Central Texas Plains, Texas Blackland Prairie regions, Crosstimbers, and the southeastern edge of the Central Great Plains, including the eastern Edwards Plateau and the Lampasas Cutplain.

Geographic Range: This alliance is found in the floodplains of medium and larger rivers, as well as along small and intermittent streams in Oklahoma and Texas, found in the East-Central Texas Plains, Texas Blackland Prairie regions, Crosstimbers, and the southeastern edge of the Central Great Plains, including the eastern Edwards Plateau and the Lampasas Cutplain.

Nations: US

States/Provinces:  OK, TX




Confidence Level: Moderate

Confidence Level Comments: No Data Available

Grank: GNR

Greasons: No Data Available


Concept Lineage: Associations in this alliance come from three old alliances: A.282 (1/4); A.286 (2/13); and A.316 (1/17).

Predecessors: No Data Available

Obsolete Names: No Data Available

Obsolete Parents: No Data Available

Synonomy: ? Acer rubrum forest alliance (Hoagland 1998a)
? Fraxinus pennsylvanica forest alliance (Hoagland 1998a)
? Ulmus americana/rubra forest alliance (Hoagland 1998a)
>< Sugarberry-Elm Series (Diamond 1993)

Concept Author(s): M. Pyne, in Faber-Langendoen et al. (2013)

Author of Description: M. Pyne

Acknowledgements: We have incorporated significant descriptive information previously compiled by D. Diamond, B. Hoagland, S. Landaal, and J. Teague.

Version Date: 09-26-14

  • Bush, J. K., and O. W. Van Auken. 1983. Woody-species composition of the upper San Antonio River gallery forest. Texas Journal of Science 36:139-148.
  • Diamond, D. D. 1993. Classification of the plant communities of Texas (series level). Unpublished document. Texas Natural Heritage Program, Austin. 25 pp.
  • Faber-Langendoen, D., J. Drake, M. Hall, G. Kittel, S. Menard, C. Nordman, M. Pyne, M. Reid, M. Russo, K. Schulz, L. Sneddon, K. Snow, and J. Teague. 2013-2019b. Screening alliances for induction into the U.S. National Vegetation Classification: Part 1 - Alliance concept review. NatureServe, Arlington, VA.
  • Hoagland, B. W. 1998a. Classification of Oklahoma vegetation types. Working draft. University of Oklahoma, Oklahoma Natural Heritage Inventory, Norman. 43 pp.