Missoula County MSU Extension Service Weed District

Weed ID

HOARY ALYSSUM

Brassicaceae or Mustard Family
Berteroa incana

GROWTH HABIT: Biennial, grows 1 to 3 1/2 feet tall.

LEAVES: Greyish-green with star-shaped hairs.  Basal leaves 1 to 2 inches long with slender stalks. Stem leaves face upward, pressed to stem.  Lower leaves with short stalks, upper leaves lack stalks.

STEMS: Erect, branched and covered with star-shaped hairs.

FLOWERS: White, deeply notched petals on slendar stalks.  Sepals hairy and drop off.

ROOTS: Taproot.

SEEDS: Flattened oval seed pods with star-shaped hairs close to stem. Pod chambers contain 3 to 7 seeds.

REPRODUCES: By seed.

HABITAT: Fields, pastures, roadsides.