Hoary Alyssum
(Berteroa incana)

Photo from Weeds of Nebraska and the Great Plains

Toxicity: Horses, even when cured in hay.

Growth Habit: Annual forb that grows 1 to 2.6 feet in height.

Leaves: Alternate; blades simple, oblanceolate to occasionally elliptic, tip sharply pointed to blunt or rounded, margins entire, grayish-green, stellate (star-shaped) pubescence.

Stem: Stiffly erect, usually branching above, grayish-green, stellate (star shaped) pubescence)

Flower: White, petals 4, deeply divided, short filaments flanked on each side by a short semicircular gland; sepals 4, equal ascending.

Roots: Taproot

Seeds: Round to oblong, narrowly winged, grayish-brown, and rough

Reproduction: Seeds

Habitat: Hoary Alyssum can be found in pastures, small grain fields, roadsides, & waste areas.

Biological Control:

Herbicide: 2,4-D

Caution: Hoary Alyssum is toxic to horses.