Geraniaceae

Geranium robertianum

Herb Robert

Prostrate to upright, unpleasant-smelling. Stems hairy. Leaves triangular, lower leaves 1–2 in. wide, palmately divided into 3 leaflets that are pinnately lobed. Flower stalks carry 2 flowers with rounded petals 1/3–1/2 in. long, reddish or pink with white veins. Grows in moist open to shady sites up to 4000 ft. A noxious weed originally introduced as a garden plant; suppresses native species in west-side forests and is spreading rapidly. Three other small geraniums, G. carolinianum, G. dissectum, and G. bicknellii, also have deeply dissected leaves.

• Rarity: Locally Common
• Flowering Time: All Summer
• Life Cycle: Annual, Biennial
• Height: 4--20 inches
• Habitat: West-Side Forest, Disturbed
• Found In: Olympic Np, Mt. Rainier Np, N Cascades Np
• Native: No