Rhododendron viscosum (Linnaeus) Torrey var. viscosum . Swamp Azalea, Clammy Azalea. Phen: Jun-Jul; Jul-Oct. Hab: Moist streambanks, shrub balds, and other moist habitats. Dist: ME and MY, WV, e. TN, n. AR, and ne. OK, south to c. peninsular FL and e. TX.

Origin/Endemic status: Native

Synonymy: = Miller (2012); > Azalea oblongifolia Small; >< Azalea viscosa L. – S; > Rhododendron oblongifolium (Small) Millais – Tx, Wilson & Rehder (1921); < Rhododendron viscosum (L.) Torr. – Ar, C, F, Fl5, FNA8, G, GW2, K1, K3, K4, NE, NY, Pa, Va, W, WH3, WV, Horn (2019), Luteyn et al (1996); > Rhododendron viscosum (L.) Torr. var. glaucum Torr. – Tat, Wilson & Rehder (1921); > Rhododendron viscosum (L.) Torr. var. hispidum Voss – Wilson & Rehder (1921); > Rhododendron viscosum (L.) Torr. var. nitidum A.Gray – Wilson & Rehder (1921); < Rhododendron viscosum (L.) Torr. var. viscosum – RAB; > Rhododendron viscosum (L.) Torr. var. viscosum – Tat, Wilson & Rehder (1921)

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Wetland Indicator Status:

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

Heliophily: 5