Roughstem Rosinweed
Silphium radula
Also known as: Reverchon's Rosinweed
Taxonomy
- Division:
- Magnoliophyta | - Flowering plants
- Family:
- Asteraceae
- Genus:
- Silphium
- Species:
- Silphium radula
Growth Characteristics
- Life Cycle:
- Perennial
- Growth Habit:
- Forb/herb
- Height:
- 8-12 ft
- Light Requirements:
- Full Sun
- Bloom Months:
- jun, jul, aug
- Bloom Colors:
- Yellow
Native Range
United States: Alabama, Arkansas, Georgia, Louisiana, Missouri, Mississippi, Oklahoma, South Carolina, Texas
Keystone Species Ranking
- Bee Keystone:
- ★★★★☆ Based on number of native bee species using this genus for pollen and nectar (Source: National Wildlife Federation)
Reported Fauna Sightings
Bees: Common eastern bumble bee (Bombus impatiens), Common eastern bumble bee (Bombus impatiens)
Soil Requirements
- Soil Type:
- sandy, well-drained, nutrient-poor soil
- pH:
- 6.0 - 7.5 (slightly acidic to neutral)
- Drainage:
- excellent drainage required
- Moisture:
- dry to moderate
- Notes:
- Prefers open, sunny habitats like prairies.