Penstemon ambiguus

Familia: Plantaginaceae
Tribus: Cheloneae
Genus: Penstemon
Subgenus: P. subg. Penstemon
Section: P. sect. Ericopsis
Subsection: P. subsect. Ambigui
Species:
Varietates: P. a. var. ambiguus – P. a. var. laevissimus

Penstemon ambiguus Torr., Ann. Lyceum Nat. Hist. New York 2: 228 (1827).

• Homotypic
  • Leiostemon ambiguus (Torr.) Greene, Leafl. Bot. Observ. Crit. 1: 223 (1906).

• Torrey, J. 1827. Some account of a collection of plants made during a journey to the Rocky Mountains in the summer of 1820, by Edwin P. James, M. D. Assistant Surgeon U.S. Army. Annals of the Lyceum of Natural History of New York 2: 161–254. BHL Reference page. 

• Flora of North America Editorial Committee (2019). Flora of North America North of Mexico 17: 1-737. Oxford University Press, New York, Oxford.
• Villaseñor, J.L. 2016. Checklist of the native vascular plants of Mexico. Revista Mexicana de Biodiversidad 87: 559–902. DOI: 10.1016/j.rmb.2016.06.017 Online PDF Reference page. 

• Govaerts, R. et al. 2025. Penstemon ambiguus in Kew Science Plants of the World Online. The Board of Trustees of the Royal Botanic Gardens, Kew. Published online. Accessed: 2025 Jul 14. Reference page. 
• Tropicos.org 2025. Penstemon ambiguus. Missouri Botanical Garden. Published online. Accessed: 14 Jul 2025. Reference page.
• International Plant Names Index. 2025. Penstemon ambiguus. Published online. Accessed: 14 Jul 2025. Reference page.
• Hassler, M. 2025. World Plants. Synonymic Checklist and Distribution of the World Flora. . Penstemon ambiguus. Accessed: 14 Jul 2025.
• USDA, ARS, Germplasm Resources Information Network. Penstemon ambiguus in the Germplasm Resources Information Network (GRIN), U.S. Department of Agriculture Agricultural Research Service. Accessed: 09-Oct-10.

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