Centaurea cyanus, commonly known as cornflower or bachelor's button, [note 1] is an annual flowering plant in the family Asteraceae native to Europe. In the past, it often grew as a weed in cornfields (in the broad sense of "corn", referring to grains, such as wheat, barley, rye, or oats), hence its name.

2023年3月9日 · Centaurea cyanus, commonly known as cornflower or bachelor’s button, is an annual or biennial herbaceous plant from the Asteraceae family. Centaurea cyanus is native to Europe and Asia. It is not clear where it was first cultivated, as it has been grown in gardens and cultivated for centuries.

Bearing charming and profuse flowers for months, Centaurea cyanus, known as Cornflower or Bachelor’s Button, are particularly attractive annual plants with usually double, daisy-like flower heads, 1.5 in. wide (3.5 cm), in shades of blue, pink, lavender, white, and maroon.

cornflower, (Centaurea cyanus), herbaceous annual plant of the Asteraceae family. Native to Europe, cornflowers are widely cultivated in North America as garden plants and have naturalized as an invasive species in some areas outside of their native range.

Finely hairy, straw-colored at maturity with a tuft of short, stiff, light brown bristles at the tip. Leaves are alternate, 1 to 4 inches long, pointed at the tip that are sparsely to moderately covered in long, matted hairs, a distinguishing characteristic of this plant.

2022年7月13日 · Centaurea cyanus is an annual while C. montana is perennial. Both display the same rich blue color, but C. Montana flowers have single petals and a dark reddish-purple center. Also, the lance-shaped leaves are fuller than those of the annual variety, and the plant is generally a little shorter in stature.

Centaurea cyanus is an annual herb that is not native to California. Calflora: Information on California plants for education, research and conservation, with data contributed by public and private institutions and individuals. [web application]. 2025. Berkeley, California: The Calflora Database [a non-profit organization].

Bachelor’s buttons are those small blue flowers with a round, thistle-like shape. Their botanical name is Centaurea cyanus, and they are also known by the common name of cornflower because of their prevalence in cornfields in their native Europe.

Centaurea cyanus is an annual cornflower native to Europe that has escaped gardens and naturalized throughout much of the United States and southern Canada. In Missouri, it is typically found in fields and waste grounds and along railroads and roadsides (Steyermark).

Centaurea cyanus is a ANNUAL growing to 1 m (3ft 3in) by 0.3 m (1ft) at a fast rate. It is not frost tender. It is in flower from June to August, and the seeds ripen from August to October.