- Centaurea nigra is a perennial plant that can grow from 1-3 ft. (0.3-0.9 m) tall.
- Leaves, near the base, are petiolate, oblanceolate, shallowly dentate and 2-10 in. (5-25 cm) long. As leaves move up the stem, they become smaller, sessile, linear, and entire.
- Flowering occurs from June to October, when purple (rarely white) flowers appear in heads at the tips of the branches.
- Bracts that subtend the flower head are dark brown to black with numerous wiry lobes along the margins.
- Ecological Threat
- Centaurea nigra is native to Europe and was first found in the United States in 1895 in Pullman, Washington. Preferred habitat includes roadsides, waste places, fields and clearings.
Images from Bugwood.org