GeraniaceaeGeranium 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
