Keckiella is a genus of flowering shrubs in the plantain family (Plantaginaceae), native to the American Southwest. The genus comprises seven species, all woody perennial shrubs or sub-shrubs that were formerly classified within the large genus Penstemon as section Hesperothamnus. Keckiella was established as a separate genus to accommodate these distinctly woody, shrubby beardtongues, which differ from the predominantly herbaceous Penstemon in their more robust, lignified growth habit.
The flowers of Keckiella are tubular and bilaterally symmetrical, closely resembling those of snapdragons — a likeness reflected in common names such as "snapdragon penstemon." Flower colors range from bright scarlet and orange-red (K. ternata, K. cordifolia) to yellow (K. antirrhinoides). The leaves are opposite and variable across species, from cordate to narrower forms.
Species are concentrated in California, where they grow in chaparral, coastal sage scrub, yellow-pine forests, and rocky hillsides, generally at elevations between 100 and 1,800 m. A few species extend into Baja California and neighboring southwestern states. The genus is named in honor of the American botanist David D. Keck, who made significant contributions to the taxonomy of western North American flora.
Notable species include K. antirrhinoides (yellow bush snapdragon), K. cordifolia (heartleaf keckiella, a climbing form), K. breviflora (bush beardtongue of the eastern Sierra), K. ternata (scarlet keckiella), and K. corymbosa (redwood keckiella).
Etymology
The genus name Keckiella honors David D. Keck (1903–1995), an American botanist who specialized in the flora of western North America. The diminutive suffix -ella is a standard Latin botanical convention. The genus was separated from Penstemon, where the species had been placed in section Hesperothamnus.
Distribution
Keckiella species are native to the American Southwest, with the great majority of species found in California. They grow in chaparral, coastal sage scrub, desert scrub, and yellow-pine forest habitats, typically at elevations of 100–1,800 m. Some species extend into Baja California and adjacent southwestern states.
Taxonomy Notes
Keckiella was previously included in Penstemon as section Hesperothamnus, distinguished by its woody, shrubby habit. The genus is placed in the family Plantaginaceae (formerly treated in Scrophulariaceae before molecular phylogenetics reorganized that family). GBIF records 15 descendant taxa under this genus.
