Penstemon payettensis

A. Nelson & J. F. Macbride
Bot. Gaz. 62: 147. 1916.
Common names: Payette beardtongue
Endemic
Treatment appears in FNA Volume 17. Treatment on page 175. Mentioned on page 158.

Stems ascending to erect, (15–)30–70 cm, glabrous, not glaucous. Leaves basal and cauline, leathery or not, glabrous, not glaucous; basal and proximal cauline 80–140(–180) × (10–)15–35(–40) mm, blade ovate to elliptic, base tapered, margins entire, apex obtuse to acute; cauline 5–7 pairs, sessile, (28–)40–80(–110) × 6–30(–42) mm, blade ovate to lanceolate, base tapered to cordate-clasping, apex acute. Thyrses continuous, sometimes interrupted proximally, cylindric, (3–)8–32 cm, axis glabrous, verticillasters 4–10(–16), cymes 2–4(–8)-flowered, 2 per node; proximal bracts ovate to lanceolate, 12–80 × 2–35 mm; peduncles and pedicels glabrous. Flowers: calyx lobes lanceolate, 5–8.5(–10) × 1–2 mm, glabrous; corolla blue to violet, without nectar guides, ventricose, 18–22 mm, glabrous externally, glabrous internally, tube 6–9 mm, throat gradually inflated, not constricted at orifice, 7–10 mm diam., slightly 2-ridged abaxially; stamens: longer pair reaching orifice or slightly exserted, pollen sacs opposite, navicular, 1.2–1.9 mm, dehiscing incompletely, connective not splitting, sides glabrous, sutures denticulate, teeth to 0.1 mm; staminode: 13–15 mm, included, 0.5–0.9 mm diam., tip straight, distal 2–3 mm sparsely pilose, sometimes glabrous, hairs yellow, to 0.5 mm; style 13–17 mm. Capsules 8–15 × 5–8 mm. 2n = 16.


Phenology: Flowering May–Aug.
Habitat: Gravelly sagebrush shrublands, open coniferous forests.
Elevation: 1200–2600 m.

Discussion

Penstemon payettensis is known from the Northern Rocky Mountains and eastern Columbia Plateau.

Selected References

None.

Lower Taxa

None.