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Yellowstone County, Montana
Noxious Weed
Weed Information Contact Department

Blue Weed
(Echium vulgare)


Blue Weed Toxic
Blue Weed Rosetta

Blue Weed Stem

Blue Weed Leaf

Blue Weed Bloom

Blue Weed Plant

Toxic: Toxic. Contains pyrrolizidine alkaloids. Toxic to humans, horses and cattle.

Growth Habit: biennial to short-lived taprooted perennial growing to 2 ½ feet in height

Leaves: Leaves are alternate, sessile; all leaves are entire, acute, linear lanceolate or linear-oblong with single midvein.

Stem: 1 meter in height, lateral stems often ascending, green with purple spotting (from spine bases), dense pubescent and also with straight spines. Spines clear and crystalline.

Flower: Corolla shallowly 5-lobed, zygomorphic, blue-purple to pink.

Roots: Large taproot.

Seeds: produces 500 to 2000 seeds per plant.

Reproduction: By Seed.

Habitat: Invades rangelands, pastures, roadsides, and idle areas particularly on coarse, sandy to gravelly soils.

Biological Controls:

Herbicides: Glyphosate, dicamba, 2,4 - D + dicamba, and Escort


Video Supplied By Ravalli County Weed District