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A3633 Quercus phellos Piedmont Floodplain Forest Alliance

Type Concept Sentence: These floodplain swamp forests are found in the Piedmont and adjacent Atlantic Coastal Plain and Chesapeake Bay regions from New Jersey to Mississippi; their canopies are typically dominated by one or more of the following species: Quercus laurifolia (in the coastal plains) Quercus palustris (only from Virginia to New Jersey), and/or Quercus phellos.


Common (Translated Scientific) Name: Willow Oak Piedmont Floodplain Forest Alliance

Colloquial Name: Piedmont Willow Oak Floodplain Forest

Hierarchy Level:  Alliance

Type Concept: This alliance is found in the Piedmont and adjacent Atlantic Coastal Plain and Chesapeake Bay regions from New Jersey to Mississippi. Depending on the location of an example within this range, canopies are typically dominated by one or more of the following species: Quercus laurifolia (in the coastal plains) Quercus palustris (only from Virginia to New Jersey), and/or Quercus phellos. Other tree species characteristic of forests in this alliance include Acer rubrum, Betula nigra, Fraxinus pennsylvanica, Liquidambar styraciflua, Nyssa sylvatica, Quercus lyrata, Quercus michauxii, Quercus pagoda, and Ulmus americana. Acer rubrum and Liquidambar styraciflua may increase with disturbance. Stands occur in seasonally flooded portions of active floodplains that periodically receive overbank flooding and hold water into the growing season.

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: These are generally closed-canopy floodplain swamp forests. The subcanopy layer is often well-developed; the shrub and herbaceous layers usually are sparse.

Floristics: Depending on the location of an example within this large range, canopies are typically dominated by one or more of the following species: Quercus laurifolia (in the coastal plains) Quercus palustris (only from Virginia to New Jersey), and/or Quercus phellos. Other tree species characteristic of forests in this alliance include Acer rubrum, Betula nigra, Fraxinus pennsylvanica, Liquidambar styraciflua, Nyssa sylvatica, Quercus lyrata, Quercus michauxii, Quercus pagoda, and Ulmus americana, and (to the south) Fraxinus caroliniana, Nyssa biflora, Quercus nigra, and Taxodium distichum. The subcanopy layer is often well-developed; Carpinus caroliniana is common. Vines are prominent and species include Apios americana, Bignonia capreolata, Campsis radicans, Parthenocissus quinquefolia (= var. quinquefolia), Smilax bona-nox, Smilax glauca (= var. glauca), Smilax rotundifolia, Toxicodendron radicans ssp. radicans, and Vitis rotundifolia. The usually sparse shrub and herbaceous layers include Asimina triloba, Ilex decidua, Itea virginica, Justicia ovata, Proserpinaca pectinata, Sabal minor, and Saururus cernuus. The exotics Ligustrum sinense, Lonicera japonica, and Microstegium vimineum may be common in examples of this alliance.

Dynamics:  Some of the vegetation placed here may have had its composition affected by the planting or spread from plantings of Pinus taeda.

Environmental Description:  This alliance occurs in seasonally flooded portions of active floodplains that periodically receive overbank flooding. It is fairly common on small stream floodplains and creek bottoms.

Geographic Range: This alliance is found in the Piedmont and adjacent Atlantic Coastal Plain and Chesapeake Bay regions from New Jersey to Mississippi.

Nations: US

States/Provinces:  AL?, DC, DE, GA, MD, NC, NJ, PA, SC, VA




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.4 Swamp Chestnut Oak - Bald-cypress - Pecan Southern Floodplain Forest Macrogroup M031 1.B.3.Nb.4
Group 1.B.3.Nb.4.a Swamp Chestnut Oak - Laurel Oak - Sweetgum Floodplain Forest Group G034 1.B.3.Nb.4.a
Alliance A3633 Willow Oak Piedmont Floodplain Forest Alliance A3633 1.B.3.Nb.4.a
Association CEGL006494 Willow Oak - Sweetgum / Virginia Springbeauty Floodplain Forest CEGL006494 1.B.3.Nb.4.a
Association CEGL006498 Willow Oak - (Pin Oak, Overcup Oak) / Possum-haw / Cattail Sedge Floodplain Forest CEGL006498 1.B.3.Nb.4.a
Association CEGL007006 Sweetgum - (Willow Oak, Water Oak, White Oak) / American Hornbeam Floodplain Forest CEGL007006 1.B.3.Nb.4.a
Association CEGL007013 Green Ash - American Sycamore - Sugarberry / Indian Woodoats Piedmont Floodplain Forest CEGL007013 1.B.3.Nb.4.a
Association CEGL007321 American Beech - Southern Sugar Maple / Pawpaw / Eastern Poison-ivy / Eastern Woodland Sedge Forest CEGL007321 1.B.3.Nb.4.a
Association CEGL007356 Cherrybark Oak - Willow Oak - Overcup Oak - Swamp Chestnut Oak / Indian Woodoats Swamp Forest CEGL007356 1.B.3.Nb.4.a
Association CEGL007551 Loblolly Pine - (Willow Oak, Water Oak, Laurel Oak) Floodplain Forest CEGL007551 1.B.3.Nb.4.a

Concept Lineage: A.287 (1/ ); A.327 (2/ ); A.437 (1/ ). This is primarily the Piedmont portion of A.327 with two additional associations.

Predecessors: No Data Available

Obsolete Names: No Data Available

Obsolete Parents: No Data Available

Synonomy: No Data Available

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 Sally Landaal, Judy Teague, Michael Schafale, and Alan Weakley.

Version Date: 01-08-14

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