Several azalea specimens in the azalea collection at the US National Arboretum; these are all "Glenn Dale" hybrid varieties, distinguished by the spotted throats, bred by the National Arboretum at an introduction station in Glenn Dale, Maryland (about 2 km from my house!). In the Arboretum, Washington, DC, 20180505.
#WashingtonDC #NationalArboretum #USNA #Azaleas #Rhododendron #RhododendronShirokujaku #RhododendronOrage #Chloe #RhododendronTrouper #GlennDaleAzalea #IGMem