Northern Prairie Wildlife Research Center
Western Wetland Flora
Field Office Guide to Plant Species
Senecio triangularis Hook.
- Family: Composite (Compositae)
- Flowering: July-September
- Field Marks: This Senecio is readily distinguished from all others by its triangular leaves that are conspicuously toothed.
- Habitat: Along streams, in wet meadows, particularly in the higher mountains.
- Habit: Perennial from a thickened rootstock and with fibrous roots.
- Stems: Upright, usually unbranched, up to 4 feet tall, smooth or less commonly with soft hairs, usually several growing from the base of the plant.
- Leaves: Alternate, simple, distinctly triangular, pointed at the tip, heart-shaped or truncate to the base, conspicuously toothed, smooth or rarely with soft hairs, up to 8 inches long, usually much smaller, up to 5 inches wide, the lower on lon
- Flowers: Many crowded together into heads, with several heads arranged to form a flat
topped cluster, each head 1-1 1/4 inches across, subtended by 9-13 black-tipped bracts, all
flowers with rays.
- Rays: Yellow, up to 12 per head, up to 1/2 inch long or a little longer.
- Sepals: 0.
- Petals: 5, united to form a strap-shaped ray.
- Stamens: 5.
- Pistils: Ovary inferior.
- Fruits: Achenes crowded into small heads, each achene smooth, several-veined, up to 1/5 inch long, bearing several soft, white bristles.
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