How to identify Rusty blackhaw (Viburnum rufidulum)
Rusty blackhaw, also known as Blue haw
Rusty blackhaw exhibits a variety of growth forms, typically as a multi-stemmed shrub or occasionally a small tree reaching up to 12 to 15 feet (approximately 3.7 to 4.6 meters) in height. Its leaves are broad and ovate with serrated margins and are distinctively adorned with rusty-brown hairs on their undersides. Buds and stems also share this rusty-hued pubescence. In the spring, rusty blackhaw produces small, creamy-white flowers that cluster into dense, flat-topped cymes, usually 4 to 5 inches (10 to 12.5 centimeters) wide. These give way to bluish-black drupes that persist into the fall.
Lifespan: Perennial
Plant Type: Shrub
Leaf Type: Deciduous
Oval, glossy leaves with rusty-brown undersides, 4 inches (10 cm) long.
Rusty-brown haired stems and buds, 0.2 to 0.4 inches (5 to 10 mm) thick.
Creamy-white flowers in 5-inch (12.7 cm) cymes with long stamens.
Dark blue, fleshy berries, 3/8 inch (1 cm) long, in clusters.
Rugged bark with fine mosaic-like blocky pattern, gray to brown hues.
The leaves of rusty blackhaw are oval, glossy, and leathery, measuring 4 inches (10 cm) in length. They are dark green on the upper surface and have rusty brown hairs underneath. The stems also exhibit these hairs. Leaf margins are finely serrated, with tips being rounded or broadly pointed, and bases rounded. These leaves display excellent fall colors, including vivid reds, purples, and oranges.
The flowers of rusty blackhaw bloom from March to April, featuring rounded cymes that are 5 inches (12.7 cm) wide. Each tiny flower measures 1/4 inch (0.6 cm) across and is characterized by long stamens. These delicate flowers form dense clusters, creating a visually striking display. While individual blooms are small, their collective arrangement and prominent stamens are key identifying features. The flowers' scent enhances their appeal, making them a notable aspect of this plant's springtime appearance.
The stem of rusty blackhaw is readily identifiable by its reddish-brown twigs, which are covered with a thin light gray coating. It also features rusty brown hairs along the stem. The stems are moderately thick, measuring approximately 0.2 to 0.4 inches (5 to 10 mm) in diameter. The branching pattern is typically upright and slightly spreading. These characteristics make the stem a distinctive feature for identifying rusty blackhaw.
The fruit of rusty blackhaw manifests as clusters of small, oval-shaped berries, each measuring roughly 3/8 inch (about 1 cm) in length. These berries boast a rich, dark blue hue when they reach maturity in the months of September to October. The fleshy texture of the fruits adds to their distinct appearance, and they often attract various birds and wildlife due to their vibrant coloration and accessibility on the plant.
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Scientific Classification of Rusty blackhaw
