Print Report

A3689 Quercus geminata - Quercus myrtifolia Dune Shrubland Alliance

Type Concept Sentence: These are upland maritime dune shrublands or "coastal scrubs" dominated by Persea borbonia, Quercus geminata, Quercus myrtifolia, and Serenoa repens, that occur in a narrow strip near the coast on acidic sands in Panhandle Florida and adjacent Alabama, south along the Florida peninsular coasts, and possibly in adjacent Georgia. One association of the Florida peninsular coast consists of nearly pure stands of Ceratiola ericoides.


Common (Translated Scientific) Name: Sand Live Oak - Myrtle Oak Dune Shrubland Alliance

Colloquial Name: Scrub Oak Dune Shrubland

Hierarchy Level:  Alliance

Type Concept: These are upland maritime dune shrublands or "coastal scrubs" dominated by Persea borbonia, Quercus geminata, Quercus myrtifolia, and Serenoa repens. Other characteristic species include Erythrina herbacea, Ilex vomitoria, Juniperus virginiana var. silicicola, Lyonia ferruginea, Morella cerifera, Osmanthus americanus, and Quercus chapmanii. In Panhandle Florida, examples contain Chrysoma pauciflosculosa, Chrysopsis gossypina ssp. cruiseana, Chrysopsis godfreyi, Conradina canescens, Lupinus westianus, and Polygonella macrophylla. Characteristic lichens are Cladonia evansii, Cladonia leporina, and Cladonia prostrata, which may form 100% cover in some places. This vegetation occurs in a narrow strip near the coast on acidic sands in Panhandle Florida and adjacent Alabama, south along the Florida peninsular coasts, and possibly in adjacent Georgia. One southern association has Ceratiola ericoides as a dominant and includes tropical components such as Cassytha filiformis and Ximenia americana. It is found on ridges and dunes of the Florida peninsular coast and consists of nearly pure stands of Ceratiola ericoides possibly with scattered Pinus clausa and scrub oaks. The herb layer is generally sparse and dominated by lichens, particularly Cladonia evansii, Cladonia subtenuis, Cladonia leporina, and Cladonia prostrata. The white or light-colored sandy soils are well-drained and infertile. Ceratiola ericoides scrub is pyrogenic with fire frequencies of 30-40 years, depending on fuel availability and ignition sources.

Diagnostic Characteristics: These are upland maritime dune shrublands dominated by Quercus geminata and/or Quercus myrtifolia rather than Quercus virginiana.

Rationale for Nominal Species or Physiognomic Features: No Data Available

Classification Comments: The old alliances A.779 and A.817 were designed to be floristically based and to include "Florida Scrub" from both inland (Lake Wales Ridge) and maritime examples. This new alliance (A3689) unites the maritime components from both of these old alliances.

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

Physiognomy and Structure: Examples dominated by Ceratiola ericoides are shrub-dominated, sometimes with scattered Pinus clausa. This community is temporally variable in stature of the shrubs, since it experiences stand-replacing fires.

Floristics: These are upland maritime dune shrublands or "coastal scrubs" dominated by Persea borbonia, Quercus geminata, Quercus myrtifolia, and Serenoa repens. Other characteristic species include Erythrina herbacea, Ilex vomitoria, Juniperus virginiana var. silicicola, Lyonia ferruginea, Morella cerifera (= Myrica cerifera), Osmanthus americanus, and Quercus chapmanii. In Panhandle Florida, examples contain Chrysoma pauciflosculosa, Chrysopsis gossypina ssp. cruiseana, Chrysopsis godfreyi, Conradina canescens, Lupinus westianus, and Polygonella macrophylla. Characteristic lichens are Cladonia evansii (= Cladina evansii), Cladonia leporina, and Cladonia prostrata, which may form 100% cover in some places. One southern association has Ceratiola ericoides as a dominant and includes tropical components such as Cassytha filiformis and Ximenia americana. Its herb layer is generally sparse and dominated by lichens, particularly Cladonia evansii, Cladonia subtenuis (= Cladina subtenuis), Cladonia leporina, and Cladonia prostrata.

Dynamics:  Ceratiola ericoides scrub is pyrogenic with fire frequencies of 30-40 years, depending on fuel availability and ignition sources.

Environmental Description:  This vegetation occurs in a narrow strip near the coast on acidic sands in Panhandle Florida and adjacent Alabama, south along the Florida peninsular coasts, and possibly in adjacent Georgia.

Geographic Range: This alliance is found in Panhandle Florida and adjacent Alabama, south along the Florida peninsular coasts, and possibly in adjacent Georgia.

Nations: US

States/Provinces:  AL, FL, GA?




Confidence Level: Moderate

Confidence Level Comments: No Data Available

Grank: GNR

Greasons: No Data Available


Concept Lineage: This new alliance contains three associations from A.779 (3/8) and one from A.817 (1/3).

Predecessors: No Data Available

Obsolete Names: No Data Available

Obsolete Parents: No Data Available

Synonomy: >< IB8h. Gulf Coastal Scrub (Allard 1990)
? Oak Scrub (Wolfe 1990)
? Rosemary Scrub (Wolfe 1990)
>< Scrub (FNAI 1992a)

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 A.S. Weakley and J.E. Mohan.

Version Date: 09-26-14

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