Swamp Azalea (Rhododendron viscosum) July 22, 2020 1500 × 1200 Swamp Azalea (Rhododendron viscosum) Swamp Azalea, also known as Clammy Azalea for the sticky glands on the corolla, and Swamp Honeysuckle for its sweet scent. June, 2020. Napeague, Long Island. Edge of bog. Wetland habitat. Native.