Rhododendron viscosum

{{Short description|Species of flowering plant}}

{{speciesbox

| image = Swamp Azalea Blooming.jpg

| status = LC

| status_system = IUCN3.1

| status_ref = {{cite iucn |author=Good, K. |author2=Elliott, A. |year=2023 |title=Rhododendron viscosum |volume=2023 |page=e.T206043887A227707998 |doi=10.2305/IUCN.UK.2023-1.RLTS.T206043887A227707998.en |access-date=8 October 2024}}

| genus = Rhododendron

| species = viscosum

| authority = (L.) Torr.

| synonyms = {{species list

|Azalea nitida |Pursh

|Azalea oblongifolia |Small

|Azalea viscosa |L.

|Rhododendron oblongifolium |(Small) Millais

|Rhododendron viscosum var. glaucum |Torr.

|Rhododendron viscosum var. nitidum |(Pursh) A. Gray

|Rhododendron viscosum f. rhodanthum |Rehder}}

}}

Rhododendron viscosum, the swamp azalea,{{PLANTS|id=RHVI2|taxon=Rhododendron viscosum|accessdate=21 October 2015}} clammy azalea or swamp honeysuckle, is a species of flowering plant in the heath family Ericaceae. A deciduous shrub, it grows to {{convert|2.5|m|ft|abbr=on}} tall and broad. It is native to the eastern United States. It has rounded matt green leaves. In early summer it produces funnel-shaped white flowers flushed pink. The flowers have prominent stamens and are strongly fragrant.

It is hardy down to {{convert|-20 |C|F|abbr=on}} but like most rhododendron species requires a sheltered position in dappled shade with acid soil that has been enriched with leaf mold. In cultivation in the UK, Rhododendron viscosum has gained the Royal Horticultural Society's Award of Garden Merit.{{cite web | url = https://www.rhs.org.uk/plants/details?plantid=6132 | title = RHS Plantfinder - Rhododendron viscosum

| accessdate = 6 October 2018}}{{cite web | url = https://www.rhs.org.uk/plants/pdfs/agm-lists/agm-ornamentals.pdf | title = AGM Plants - Ornamental | date = July 2017 | page = 85 | publisher = Royal Horticultural Society | accessdate = 2 October 2018}}

Image:Swamp Azalea Fall Colors.jpg, New York]]

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