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A2018 Platanus occidentalis - Juglans major - Salix nigra Floodplain Woodland Alliance
Type Concept Sentence: These woodlands occur in central and western Texas on wet flats and high-energy rivershores; they are naturally or artificially disturbed and therefore maintain an open canopy. These stands are typically dominated by Platanus occidentalis. This vegetation may have Juglans major as a codominant, Platanus occidentalis as the dominant canopy with few other trees, and Juglans microcarpa as a shrub, or Salix nigra as a codominant.
Common (Translated Scientific) Name: American Sycamore - Arizona Walnut - Black Willow Floodplain Woodland Alliance
Colloquial Name: American Sycamore - Arizona Walnut Floodplain Woodland
Hierarchy Level: Alliance
Type Concept: These woodlands occur in central and western Texas on wet flats and high-energy rivershores; they are naturally or artificially disturbed and therefore maintain an open canopy. These stands are typically dominated by Platanus occidentalis. This vegetation may have Juglans major as a codominant, Platanus occidentalis as the dominant canopy with few other trees, and Juglans microcarpa as a shrub, or Salix nigra as a codominant. Acer grandidentatum may be present, as well as Prunus serotina var. eximia. This alliance is best documented by association-level data in the Edwards Plateau and adjacent Chihuahuan Desert of Texas; its presence elsewhere remains speculative.
Diagnostic Characteristics: Platanus occidentalis, Juglans major woodland, occupying rocky wet flats and high-energy rivershores.
Rationale for Nominal Species or Physiognomic Features: No Data Available
Classification Comments: This vegetation is likely to be closely related to other riparian vegetation of Texas, New Mexico, Arizona, and Mexico. Once this vegetation is reviewed for alliance placement, we will have a better idea if the vegetation currently placed in this alliance may be better classified elsewhere or if other associations not currently under review belong here. There may also be undescribed associations representing this alliance.
Similar NVC Types: No Data Available
note: No Data Available
Physiognomy and Structure: No Data Available
Floristics: These stands are typically dominated by Platanus occidentalis. Other canopy components are variable. One association may have Juglans major as a codominant, another (e.g., in the Edwards Plateau of Texas) is typically dominated by Platanus occidentalis and few other trees, with Salix nigra as a codominant. Platanus occidentalis is always one of the dominant (and may be the only) trees. Juglans microcarpa is a typical and often abundant shrub, and Baccharis neglecta or Baccharis salicifolia are often present as well. Other typical species include Panicum virgatum and Schizachyrium scoparium. Other canopy trees include Acer grandidentatum and Prunus serotina var. eximia. In this type, herbs are patchy, but sometimes dense, and include Andropogon glomeratus var. pumilus, Panicum virgatum, Verbesina virginica, and Muhlenbergia lindheimeri.
Dynamics: Stands of this alliance are naturally or artificially disturbed and therefore maintain an open canopy.
Environmental Description: These woodlands occur on wet flats and high-energy rivershores, primarily in the Edwards Plateau and adjacent Chihuahuan Desert of Texas. Some Texas examples (e.g., ~Platanus occidentalis - (Salix nigra) / Juglans microcarpa - Baccharis salicifolia Floodplain Woodland (CEGL004930)$$) are described as "gallery woodlands" and occur along streams and rivers in arid areas of the Edwards Plateau and Stockton Plateau.
Geographic Range: These woodlands occur in central and western Texas on wet flats and high-energy rivershores.
Nations: US
States/Provinces: TX
Plot Analysis Summary:
http://vegbank.org/natureserve/ELEMENT_GLOBAL.2.899189
Confidence Level: Low
Confidence Level Comments: No Data Available
Grank: GNR
Greasons: No Data Available
| Type | Name | Database Code | Classification Code |
|---|---|---|---|
| Class | 1 Forest & Woodland Class | C01 | 1 |
| Subclass | 1.B Temperate & Boreal Forest & Woodland Subclass | S15 | 1.B |
| Formation | 1.B.3 Temperate Flooded & Swamp Forest Formation | F026 | 1.B.3 |
| Division | 1.B.3.Nb Southeastern North American Flooded & Swamp Forest Division | D062 | 1.B.3.Nb |
| Macrogroup | 1.B.3.Nb.5 Pecan - Sugarberry - Bur Oak Floodplain Forest & Woodland Macrogroup | M154 | 1.B.3.Nb.5 |
| Group | 1.B.3.Nb.5.a Southeastern Great Plains Floodplain Forest Group | G784 | 1.B.3.Nb.5.a |
| Alliance | A2018 American Sycamore - Arizona Walnut - Black Willow Floodplain Woodland Alliance | A2018 | 1.B.3.Nb.5.a |
| Association | CEGL004929 American Sycamore - Arizona Walnut Floodplain Woodland | CEGL004929 | 1.B.3.Nb.5.a |
| Association | CEGL004930 American Sycamore - (Black Willow) / Little Walnut - Mule-fat Floodplain Woodland | CEGL004930 | 1.B.3.Nb.5.a |
Concept Lineage: No Data Available
Predecessors: No Data Available
Obsolete Names: No Data Available
Obsolete Parents: No Data Available
Synonomy: >< Salix nigra woodland alliance (Hoagland 1998a)
? Arizona Walnut Series (Diamond 1993)
? Arizona Walnut Series (Diamond 1993)
- 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.