Erect, mostly hairless, with possible hairs on underside of leaf. Stem hollow, with noticeable sheath surrounding petiole. Leaves divided into 3 egg-shaped to triangular, sharply pointed leaflets, 2–6 in. long and often lobed. Twenty to 60 small clusters of hairless flower heads on 1–4 in. stalks form flat umbel. Petals usually white, occasionally yellow or pink. Widespread, found along waterways and in wet places at low elevations. Arguta refers to the sharp teeth on leaves that are often toothed again.
- Rarity: Locally Common
- Flowering Time: Late Spring
- Life Cycle: Perennial
- Height: 2--7 feet
- Habitat: Meadow, Vernal Wet, Bog/Fen/Wetland
- Found In: Olympic Np, Mt. Rainier Np, N Cascades Np
- Native: Yes