Range and Habitat in Illinois
Blackhaw Viburnum is occasional to locally common in most areas of Illinois; it is less common or absent in parts of NW and southern Illinois. Habitats include rich mesic woodlands, upland woodlands, thinly wooded bluffs, rocky wooded slopes, limestone glades, woodland borders, and areas along woodland paths. This species is found in deciduous woodlands, particularly where oaks are dominant. It can decline in abundance when a woodland is invaded by non-native Honeysuckle shrubs, such as Lonicera maackii (Amur Honeysuckle) and Lonicera tartarica (Tartarian Honeysuckle).