Lassen Sandverbena (Tripterocalyx crux-maltae (Kellogg) Standl.)
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• Tripterocalyx crux-maltae (Lassen sandverbena) | USDA PLANTS Database (About This Site)
• Tripterocalyx crux-maltae | Biota of North America Project (BONAP) (About This Site)
• Tripterocalyx crux-maltae (Kellogg) Standl. | Plants of the World Online (POWO) (About This Site)
• Tripterocalyx crux-maltae | NatureServe Explorer (About This Site)
• Tripterocalyx crux-maltae | Flora of North America (About This Site)