Penstemon azureus

Taxonavigation

Taxonavigation: Lamiales
Classification System: APG IV Superregnum: Eukaryota Regnum: Plantae Cladus: Angiosperms Cladus: Eudicots Cladus: Core eudicots Cladus: Asterids Cladus: Lamiids Ordo: Lamiales

Penstemon azureus Benth., Pl. Hartw.: 327 (1849).

Homotypic
- Penstemon heterophyllus var. azureus (Benth.) Jeps., Man. Fl. Pl. Calif.: 917 (1925).
- Penstemon azureus subsp. typicus D.D.Keck, Univ. Calif. Publ. Bot. 16: 402 (1932), nom. inval.

Native distribution areas:
Continental: Northern America Regional: Northwestern U.S.A. Oregon. Regional: Southwestern U.S.A. California. References: Brummitt, R.K. 2001. TDWG – World Geographical Scheme for Recording Plant Distributions, 2^nd Edition

Bentham, G. 1839–1857. Plantas Hartwegianas imprimis mexicanas adjectis nonnullis Grahamianis enumerat novasque describit Georgius Bentham. 393 pp. Londini [London]. 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.

Govaerts, R. et al. 2025. Penstemon azureus in Kew Science Plants of the World Online. The Board of Trustees of the Royal Botanic Gardens, Kew. Published online. Accessed: 2025 Jul 12. Reference page.
Tropicos.org 2025. Penstemon azureus. Missouri Botanical Garden. Published online. Accessed: 12 Jul 2025. Reference page.
International Plant Names Index. 2025. Penstemon azureus. Published online. Accessed: 12 Jul 2025. Reference page.
Hassler, M. 2025. World Plants. Synonymic Checklist and Distribution of the World Flora. . Penstemon azureus. Accessed: 12 Jul 2025.
USDA, ARS, Germplasm Resources Information Network. Penstemon azureus in the Germplasm Resources Information Network (GRIN), U.S. Department of Agriculture Agricultural Research Service. Accessed: 09-Oct-10.