Acer rubrum Linnaeus var. drummondii (Hooker & Arnott ex Nuttall) Sargent. Section: Rubra. Drummond’s Maple, Swamp Red Maple, Drummond’s Red Maple. Phen: Jan-Mar; Mar-Jun. Hab: Swamps and floodplains, often in deeply flooded situations. Dist: A. rubrum var. drummondii is probably limited to the Mississippi River basin and its immediate tributaries; reports from more eastern areas likely represent pubescent extremes of Acer rubrum var. trilobum.

Origin/Endemic status: Endemic

Taxonomy Comments: Saeki et al. (2011) show some (chloroplast) gene exchange between Acer rubrum var. drummondii and A. saccharinum. Additional study of the Acer rubrum complex is needed.

Synonymy: = Ar, F, G, K1, K3, K4, Mo2, Tx; = Acer drummondii Hook. & Arn. ex Nutt. – Il, S13, Tn; = Acer rubrum L. ssp. drummondii (Nutt.) A.E.Murray – Murray (1970); = Rufacer drummondii (Hook. & Arn. ex Nutt.) Small – S; < Acer rubrum L. – C, GW2, NcTx, RAB, Va, WH3

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Wetland Indicator Status:

• Atlantic and Gulf Coastal Plain: FAC (taxonomic split from wetland indicator species)
• Eastern Mountains and Piedmont: FAC (taxonomic split from wetland indicator species)
• Great Plains: FAC (taxonomic split from wetland indicator species)
• Midwest: FAC (taxonomic split from wetland indicator species)
• Northcentral & Northeast: FAC (taxonomic split from wetland indicator species)

Heliophily ?: 4