Dames Rocket

Dames Rocket

Hesperis matronalis

Colorado List B - Eradication required in Jefferson County

Information Sheet (pdf)

General

• Family: Mustard (Brassicaceae)
• Has been used as an ornamental but no longer available for sale in Colorado
• Introduced from Eurasia

Habitat

• Biennial or short lived perennial forb
• Found in forests, roadsides, stream banks, pasture and rangelands

Plant

Vegetation

• Lance-shaped, slightly hairy, toothed edges, alternate
• Leaves 2 to 4 inches long
• Mature plants up to 3 to 4 feet tall

Roots

• Fibrous, shallow

Flower

• About ¾ inch wide
• Grouped at the end of vertical stems
• May to August
• White to purple with four petals

Seed

• 1 ½ inches long
• Seedpods very narrow

Reproduction

• Seed

Control

Biological

• None

Chemical

• View Information Sheet (PDF)

Cultural

• Fertilization to promote grass cover
• Prevention
• Removal - bag and dispose of flower and seedheads
• Re-vegetation of highly disturbed sites

Mechanical

• Burning - N/A
• Grazing - N/A
• Mowing- N/A

Use all chemicals according to the manufacturer's label. No specific recommendation or endorsement is made or implied by listing methods or products.