The stout stems have pith that is white, spongy, and emits a disagreeable odour when crushed. Stems may be unbranched or sparsely branched, and many stems arise from the same root system forming a wide, rounded, arching mass. Twigs are yellowish-gray and warty. Bark of older stems is thin and gray. New shoots arise from horizontal stems (stolons) that grow along the soil surface and root at the nodes.
Leaves are opposite (2 leaves per node) and consist of 5 to 11 (usually 7) coarsely-toothed leaflets. Leaflets lance-shaped, shiny and bright green above, paler green and sometimes hairy below.
Flowers form in flat-topped clusters at the ends of stems.
SOURCE: Ohio Perennial & Biennial Weed Guide

Photo: Robert Whyte
Flowers closeup

Photo: Robert Whyte
Fruit cluster
Found in moist areas such as at the edges of swamps, marshes, bogs, ponds, streams, low fields, thickets, and woods. Prefers fertile soils and conditions that are moist to wet but it also persists when fairly dry.

Photo: Robert Whyte
Fruits closeup
Berries usually contain 4 light brown, oblong, wrinkled seeds.
Raw elderberries have an unpleasant taste and contain small amounts of poisonous alkaloids. Cooking destroys the alkaloids and improves the taste.
Common names: Black Elder, Blackberry Elder, Common Elder, Common Elderberry, Elder Flower, Elderberry, Sambucus, Sweet Elder

Photo: Robert Whyte