hoary alyssum
Berteroa incana (L.) DC


Berteroa incana is an annual, biennial, or perennial in the mustard family growing 1-3 ft. (0.3-0.9 m) tall.
Stems are gray-green and hairy with many branches near the top. Alternate leaves are gray-green, hairy, alternate, oblong, narrow, 0.5-3 in. (1.3-7.6 cm) long, with smooth edges.
White flowers with 4 deeply divided petals are produced in long raceme.
Seed pods are hairy, swollen, and oblong with short beaks on the end. Oblong seeds are rough, dull gray-brown. It reproduces and spreads by seeds.
Ecological Threat
Spreads rapidly due to the high number of seeds per plant. The plant emerges early in spring and continues to flower and produce seed until frost. It can cause toxicity to horses.


Selected Images


EDDMapS Distribution

EDDMapS Distribution - This map is incomplete and is based only on current site and county level reports made by experts, herbaria, and literature. For more information, visit www.eddmaps.org

State Regulated List

State Regulated List - This map identifies those states that list this species on their regulated list. For more information, visit Invasive.org

Taxonomic Rank

Kingdom: Plantae
Phylum: Magnoliophyta
Class: Magnoliopsida
Subclass: Dilleniidae
Order: Capparales
Family: Brassicaceae
Genus: Berteroa
Subject: Berteroa incana (L.) DC

Synonyms and Other Names

Other Common Names:
hoary false madwort, hoary alyssum, hoary false alyssum


Plants - Forbs/Herbs