[Beardtongues and Penstemons: The Genus Penstemon in the Cascade Mountains of Oregon and Washington]

Siskiyou Penstemon, Tongue-leaved Penstemon

Penstemon anguineus

Synonyms: Penstemon anguineus var. rattanii, Penstemon rattanii var. minor

Inflorescence of Siskiyou Penstemon, Tongue-leaved Penstemon: Penstemon rattanii (Synonyms: Penstemon anguineus var. rattanii, Penstemon rattanii var. minor)

This photo shows the inflorescence of Siskiyou penstemon as seen along Coyote Creek Road in the Umpqua National Forest........June 25, 2005. The inflorescence consists of 2-7 verticillasters.

Internal parts of a flower of Siskiyou Penstemon, Tongue-leaved Penstemon: Penstemon rattanii (Synonyms: Penstemon anguineus var. rattanii, Penstemon rattanii var. minor)

This photo shows a close-up of the stamens of Siskiyou penstemon as seen along Coyote Creek Road in the Umpqua National Forest........June 25, 2005.

Dorsal view of the flowers of Siskiyou Penstemon, Tongue-leaved Penstemon: Penstemon rattanii (Synonyms: Penstemon anguineus var. rattanii, Penstemon rattanii var. minor)

This photo shows a view down onto the top of the inflorescence of Rattan's penstemon as seen along Coyote Creek Road in the Umpqua National Forest.......June 25, 2005. Note the numerous gland-tipped hairs on the sepals and outer corolla and the corolla tube which abruptly expands outwards at a point just beyond the sepals.

Stem leaves of Siskiyou Penstemon, Tongue-leaved Penstemon: Penstemon rattanii (Synonyms: Penstemon anguineus var. rattanii, Penstemon rattanii var. minor)

This photo shows the paired upper stem leaves of Siskiyou penstemon as seen along Coyote Creek Road in the Umpqua National Forest........June 25, 2005. Note that the upper stem leaves are clasping and sharply toothed.

Basal leaves of Siskiyou Penstemon, Tongue-leaved Penstemon: Penstemon rattanii (Synonyms: Penstemon anguineus var. rattanii, Penstemon rattanii var. minor)

Basal leaves of Siskiyou penstemon as observed in open conifer forest along the Pacific Crest Trail on the southeastern slopes of Mt. Ashland, Rogue River-Siskiyou National Forest........October 15, 2019.
Paul Slichter