Arrowwood viburnum is an upright, multibranched shrub with slender, elongated, ascending branches and many shoots from the base.
Leaves are opposite, simple, 1 to 4½ inches long, oval or rounded; coarsely toothed, strongly veined, with long leafstalks; dull green; lower surface with tiny star-shaped hairs.
Bark is smooth, tight, gray or reddish brown; pores cream-colored and prominent.
Twigs are slender, elongate, straight or arching, young ones hairy, older ones smooth.
Flowers May–June; small, white, numerous in upright clusters 2–4 inches wide, at the ends of branches or on short side branches. Flowers are trumpet-shaped with 5 spreading lobes; the stamens extend beyond the petals.
Fruits August–November; clusters of blue or blue-black berries, each 1/4 to 3/8 inch long, globe- or egg-shaped.
Similar species: Ten species in genus Viburnum are known to grow wild in our state. Viburnums can be difficult to identify to species, involving (for example) fairly fussy characteristics of the leaves, such as leafstalk length, venation patterns, the number of teeth along one side, and other precise details.