Senecio triangularis
Asteraceae
Arrowleaf Groundsel
Cluster of very tall stems with evenly spaced leaves, same size to top. Arrow-shaped leaves 2–8 in. long, on short petioles or sessile, deeply toothed. Few to numerous yellow flower heads in small cluster at top. Head includes 8 ray flowers toothed at tips, 40 disk flowers in center. Grows in wet meadows, conifer forests, streambanks, at mid to alpine elevations.
- Rarity: Locally Common
- Flowering Time: Early Summer, Mid Summer, Late Summer
- Flower Form: Senecio Tribe,Composite
- Life Cycle: Perennial
- Height: 1–5 feet
- Habitat: Bog/Fen/Wetland, East-side Forest, Meadow, Moist Riverbanks, Subalpine, West-side Forest
- Found In: Crater Lake NP, Mt. Rainier NP, N Cascades NP, Olympic NP, Steens, Wallowas, West Gorge
- Native: Yes
- Also Known As: Bog Groundsel
