Arrowleaf Ragwort
Senecio triangularis
Taxonomy
- Division:
- Magnoliophyta | - Flowering plants
- Family:
- Asteraceae
- Genus:
- Senecio
- Species:
- Senecio triangularis
Growth Characteristics
- Life Cycle:
- Perennial
- Growth Habit:
- Forb/herb , Subshrub
- Height:
- 6-8 ft
- Light Requirements:
- Part Shade
- Drought Tolerance:
- High
- Bloom Months:
- jun, jul, aug, sep
- Bloom Colors:
- Yellow
Native Range
United States: Alaska, California, Colorado, Idaho, Montana, New Mexico, Nevada, Oregon, Utah, Washington, Wyoming, Canada: Alberta, British Columbia, Northwest Territories, Yukon
Keystone Species Ranking
- Bee Keystone:
- ★★☆☆☆ Based on number of native bee species using this genus for pollen and nectar (Source: National Wildlife Federation)
Host Plant for Caterpillars
Reported Fauna Sightings
Soil Requirements
- Soil Type:
- moist, rich, well-drained loamy soil
- pH:
- 5.5 - 7.0 (slightly acidic to neutral)
- Drainage:
- good drainage preferred
- Moisture:
- consistently moist
- Notes:
- Commonly found near streams and wet meadows
Germination Information
Pre-treatment: 6-month cold moist chilling in a refrigerator maintained at 34 to 37°F or 5 month outdoor cold, moist stratification.
Establishment: This species is very responsive to decreasing light intensity with mean germination decreasing under partial and zero irradiance. There were also slight increases in seedling mortality from full irradiance to partial and zero irradiance. No appreciable gains in germination occurred after exposing the partial and zero irradiance groups to a secondary full irradiance. One protocol reported no germination, which conflicts with the other protocols.
Source: npn.rngr.net