Squashberry (Viburnum edule) is a shrub that is native to Canada, Alaska, and the northern tier of the United States. This species is a host to the holly blue (Celastrina argiolus), Spring Azure (Celastrina ladon),… 

Rusty Blackhaw (Viburnum rufidulum) is a shrub that is native to the mid-western, south-central, and eastern United States. This species is a host to the holly blue (Celastrina argiolus), Spring Azure (Celastrina ladon), Henry’s elfin… 

Downy Arrow-wood (Viburnum rafinesquianum) is a shrub that is native to the mid-western and eastern United States and Canada. This species is a host to the holly blue (Celastrina argiolus), Spring Azure (Celastrina ladon), Henry’s… 

Smooth Blackhaw (Viburnum prunifolium) is a shrub that is native to the mid-western and eastern United States. This species is a host to the holly blue (Celastrina argiolus), Spring Azure (Celastrina ladon), Henry’s elfin (Incisalia… 

Highbush Cranberry (Viburnum opulus) is a shrub that has one variety (var. americanum) that is native to the northern United States and Canada. This species is a host to the holly blue (Celastrina argiolus), Spring… 

Possumhaw (Viburnum nudum) is a shrub that is native to the eastern United States and Canada. This species is a host to the holly blue (Celastrina argiolus), Spring Azure (Celastrina ladon), Henry’s elfin (Incisalia henrici)… 

Nanny-Berry (Viburnum lentago) is a shrub that is native to the north-central and northeastern United States and Canada. This species is a host to the holly blue (Celastrina argiolus), Spring Azure (Celastrina ladon), Henry’s elfin…