Laburnum
Laburnum, a group of hardy ornamental shrubs and trees native to southern Europe and western Asia. Laburnums are grown for their glossy foliage and long, drooping clusters of yellow flowers, shaped like those of the sweet pea. The seeds, bark, and leaves are poisonous. Laburnums are often called golden chain.
The common laburnum and its varieties are grown in the United States and Canada. The tree grows to 30 feet (9 m) tall and bears flower clusters up to 8 inches (20 cm) long. Among its varieties are aureum (golden), with yellow leaves; autumnale (autumn), which flowers in fall as well as spring; and pendulum (drooping), with drooping branches.
Laburnums belong to the Laburnum genus of the pea family, Leguminosae. The common laburnum is L. anagyroides or L. vulgare.