Penstemon duchesnensis

(N. H. Holmgren) Neese

Great Basin Naturalist 46: 459. 1986.

EndemicConservation concern
Basionym: Penstemon dolius var. duchesnensis N. H. Holmgren Brittonia 31: 219, fig. 6. 1979
Treatment appears in FNA Volume 17. Treatment on page 133. Mentioned on page 126.

Stems ascending to erect, 2–6(–8) cm, pubescent or densely retrorsely hairy. Leaves basal and cauline, not leathery, retrorsely hairy; basal and proximal cauline petiolate, 8–30 × 2–9 mm, blade spatulate to oblanceolate, base tapered, margins entire, apex rounded to obtuse or acute; cauline (0 or)1–3 pairs, sessile, 14–23 × 1–4 mm, blade oblanceolate to linear, not arcuate, base tapered, margins entire, apex acute. Thyrses continuous, cylindric, 1–4 cm, axis puberulent or retrorsely hairy, verticillasters 1–5, cymes (1 or)2-flowered, 2 per node; proximal bracts oblanceolate to lanceolate or linear, 13–24 × 1–4 mm; peduncles and pedicels retrorsely hairy, sometimes sparsely glandular-pubescent. Flowers: calyx lobes lanceolate, 5–8.5 × 1–2.1 mm, retrorsely hairy, sometimes sparsely glandular-pubescent; corolla light blue to blue, lavender, or violet, without nectar guides, funnelform, 14–20 mm, glabrous or sparsely white-lanate internally abaxially, tube 6–8 mm, throat gradually inflated, not constricted at orifice, 4–7 mm diam., slightly 2-ridged abaxially; stamens included or longer pair reaching orifice, pollen sacs opposite, navicular, 0.9–1.2 mm, dehiscing completely, sutures papillate; staminode 9–11 mm, included or reaching orifice, 0.5–1.1 mm diam., tip straight to recurved, distal 5–7 mm moderately pubescent to lanate, hairs yellow or yellow-orange, to 1.5 mm; style 9–12 mm. Capsules 4–6.5 × 4–5 mm.

Phenology: Flowering May–Jun.
Habitat: Gravelly, sandy, and clayey hills, sagebrush shrublands, pinyon-juniper woodlands.
Elevation: 1500–2000 m.


Penstemon duchesnensis is known only from the western Uinta Basin in the vicinity of Duchesne, Duchesne County.

Selected References


Lower Taxa

... more about "Penstemon duchesnensis"
Craig C. Freeman +
(N. H. Holmgren) Neese +
Penstemon dolius var. duchesnensis +
1500–2000 m. +
Gravelly, sandy, and clayey hills, sagebrush shrublands, pinyon-juniper woodlands. +
Flowering May–Jun. +
Great Basin Naturalist +
Endemic +  and Conservation concern +
Penstemon sect. Albidi +
Penstemon duchesnensis +
Penstemon sect. Cristati +
species +