Arizona Sneezeweed (Helenium arizonicum S.F. Blake)
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• Helenium arizonicum (Arizona sneezeweed) | USDA PLANTS Database (About This Site)
• Helenium arizonicum | Biota of North America Project (BONAP) (About This Site)
• Helenium arizonicum | NatureServe Explorer (About This Site)
• Helenium arizonicum | Flora of North America (About This Site)
• Helenium arizonicum S.F.Blake | Plants of the World Online (POWO) (About This Site)