Asteraceae
Roughstem rosinweed
Silphium radula
- Family
- Asteraceae
- Genus
- Silphium
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Common names
By language (1)
- English
- Roughstem rosinweed
Flowers
- In flower
- April to August (from 83 flowering iNaturalist observations worldwide)
Characteristics
- Growth habit
- Forb/herb
- Lifespan
- Perennial
- In the US and Canada
- Lower 48 states: native
Photos
FlowerPhoto: Michelle W. （鍾偉瑋）, CC BY 4.0, from iNaturalist 
FlowerPhoto: Laura Clark, CC BY 4.0, from iNaturalist 
FlowerPhoto: Laura Clark, CC BY 4.0, from iNaturalist 
FlowerPhoto: Michelle W. （鍾偉瑋）, CC BY 4.0, from iNaturalist 
Photo: Eric Hunt, CC BY-SA 4.0, from Wikimedia Commons Photo: Railey, CC BY-SA 4.0, from Pl@ntNet via GBIF 
Photo: Laura Clark, CC BY 4.0, from iNaturalist 
Photo: John Kees, CC0, from iNaturalist 
Photo: hr_dragonfly, CC BY 4.0, from iNaturalist 
Photo: Michael D Fox, CC BY 4.0, from iNaturalist 
Photo: lanechaffin, CC0, from iNaturalist 
Photo: lanechaffin, CC0, from iNaturalist
More in Silphium
- Cup plantSilphium perfoliatumAsteraceae
- CompassplantSilphium laciniatumAsteraceae
- White rosinweedSilphium albiflorumAsteraceae
- Starry rosinweedSilphium asteriscusAsteraceae
- Kidneyleaf rosinweedSilphium compositumAsteraceae
- Wholeleaf rosinweedSilphium integrifoliumAsteraceae
- Mohr's rosinweedSilphium mohriiAsteraceae
- Prairie rosinweedSilphium terebinthinaceumAsteraceae
- Cumberland rosinweedSilphium brachiatumAsteraceae
- Old Cahaba rosinweedSilphium perplexumAsteraceae
- Appalachian rosinweedSilphium wasiotenseAsteraceae
- Silphium laeveAsteraceae
Sources: classification from World Flora Online Plant List (2026-06, CC0 1.0); common names, popularity from Wikidata (2026-10-26, CC0 1.0); common names, US characteristics from USDA PLANTS Database (2025-05-29, CC0 1.0). About our plant data.