Alyssum corsicum is a fast growing perennial, reaching reproductive maturity within one or two years, and is fairly long-lived. It can grow up to 3.3 ft. (1 m) tall. A. corsicum is native to southern Europe.
Foliage
Leaves are somewhat rounded. Leaves have tiny hairs on them. Most of the plant’s leaves begin to drop when the flowers begin to bloom.
Flowers
It has small yellow flower petals and blooms from about May to July.
Fruit
Fruits are broadly elliptic to orbicular, 0.14 to 0.2 in. (3.5-5 mm) × 0.1 to 0.2 in. (2.5-5 mm), with the apex obtuse to rounded.
Ecological Threat
A. corsicum has the potential to crowd out and displace native plants including rare species. It can be found in pastures, fields, and waste areas. A. corsicum is a hyperaccumulator (plants that extract metals from the soil), sometimes used to remove heavy metals from contaminated sites. Hyperaccumulators are highly toxic, containing concentrations of their target metals far in excess of levels considered toxic to cattle, sheep, swine and chickens.