III. SHRUBLAND
III.B.2.N.d. Temporarily flooded cold-deciduous shrubland
III.B.2.N.d.2. ALNUS SERRULATA TEMPORARILY FLOODED SHRUBLAND ALLIANCE
Smooth Alder Temporarily Flooded Shrubland Alliance

Concept: This alliance includes temporarily flooded shrub thickets dominated by Alnus serrulata along rivers and streams on rocky shoals and gravel bars. Other common species include Cephalanthus occidentalis, Cornus amomum, Cornus obliqua (= Cornus amomum ssp. obliqua), Cornus foemina, Hypericum prolificum, Lyonia ligustrina, Viburnum nudum, Physocarpus opulifolius, Amorpha fruticosa, Xanthorhiza simplicissima, and others.

Range: Currently this alliance is defined for the Chesapeake Bay Lowlands, Southern Blue Ridge, Ozarks, Ouachitas, Cumberland Plateau, the southern Alleghenies, and the northern Ridge and Valley. It is possible in the upper West and East Gulf coastal plains. This alliance is found in Alabama, Arkansas, Georgia, Kentucky, North Carolina, Oklahoma, South Carolina, Tennessee, Louisiana, Maryland, Delaware, Virginia, West Virginia, and possibly Missouri (?).

States/Provinces: AL AR DE GA KY LA MD MO NC NY OK PA SC TN VA? WV

TNC Ecoregions: 32:P, 38:C, 39:C, 40:?, 43:P, 44:P, 49:P, 50:C, 51:C, 52:P, 53:P, 58:C, 59:C, 60:P, 64:P

USFS Ecoregions: 212F:CP, 212G:CP, 221Bd:CCP, 221Eb:CC?, 221Ha:CCC, 221Hb:CCC, 221Hc:CCC, 221He:CC?, 222E:PP, 231B:CP, 231Cd:CCC, 231Dc:CCC, 231E:CP, 231Ga:CCC, 231Gb:CCC, 231Gc:CCC, 232B:CP, 234Ab:CCC, 255Ac:CCP, 255Ad:CCP, M212Ea:CCP, M212Eb:CCP, M221Aa:CCP, M221Ba:CP?, M221Bd:CP?, M221Cb:CC?, M221Dc:CCC, M221Dd:CCC, M222Ab:CCC, M231Aa:CCC, M231Ab:CCC, M231Ac:CCC, M231Ad:CCC

Federal Lands: DOD (Fort Benning); NPS (Great Smoky Mountains); USFS (Bankhead, Chattahoochee, Daniel Boone, Jefferson, Mark Twain, Nantahala, Ouachita, Ozark, Pisgah, Sumter); USFWS (Cahaba River, Little River)

Synonymy: IIE3a. Riverside Shoal and Stream Bar Complex (Allard 1990); Mountain stream-edge shrub/scrub vegetation (Ambrose 1990a); Rocky Bar and Shore (Schafale and Weakley 1990); Sand and Mud Bar (Schafale and Weakley 1990); Alnus serrulata shrubland alliance (Hoagland 1998a); Shoal and Stream Bar (Nelson 1986); Alnus/Xanthorhiza rocky stream margin (Newell and Peet 1995); Mountain River, in part (Wharton 1978); Alder - ninebark wetland (Fike 1999); Circumneutral Shrub Swamp, in part (Smith 1991)

References: Allard 1990, Ambrose 1990a, Cooper 1963, DuMond 1970, Fike 1999, Hoagland 1998a, Nelson 1986, Newell and Peet 1995, Rodgers 1965, Schafale and Weakley 1990, Smith 1991, Tiner 1985a, Tobe et al. 1992, Wharton 1978

Authors: D.J. ALLARD, MOD., RW, Southeast Identifier: A.943

Concept: Floodplain alder thicket of the High Alleghenies and Western Allegheny Plateau regions. In the Central Appalachians these are shrub thickets dominated by Alnus serrulata along rivers and streams on rocky shoals and gravel and bars.

States/Provinces: MD:S?, NY:S?, PA:S?, VA?, WV:S?

TNC Ecoregions: 49:P, 59:C, 60:P

USFS Ecoregions: 212F:CP, 212G:CP, 221Bd:CCP, 221E:CC, M212Ea:CCP, M212Eb:CCP, M221A:CC, M221B:CP, M221C:CC

Synonymy: Alder-ninebark thickets (CAP pers. comm. 1998)

References: CAP pers. comm. 1998, Fike 1999

Authors: ECS Confidence: 3 Identifier: CEGL006251

Concept: This Coastal Plain alluvial shrubland occurs in the Chesapeake Bay Lowlands on the non-tidal portions of rivers and non-tidal bay mouths. The shrub canopy is characterized by Cornus amomum with other associates including Alnus serrulata, Cephalanthus occidentalis and Viburnum spp., as well as saplings of Acer rubrum, Fraxinus pennsylvanica, and Salix nigra. Herbaceous associates include Osmunda regalis, Decodon verticillatus, Utricularia spp., Limnobium spongia, and Cicuta bulbifera.

Range: This Coastal Plain alluvial shrubland occurs in the Chesapeake Bay Lowlands.

States/Provinces: DE:S?, MD:S?, VA?

TNC Ecoregions: 58:C

USFS Ecoregions: 232:C

References: Tiner 1985a

Authors: ECS Confidence: 3 Identifier: CEGL006414

- Maryland Vegetation Classification Subset Report III. Shrubland

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