Leafl. W. Bot. 2: 119. 1938.
Herbs. Stems ascending to erect, 11–48 cm, retrorsely hairy or puberulent, hairs pointed, not glaucous. Leaves basal and cauline, opposite, puberulent, hairs pointed, sometimes glabrate abaxially, not glaucous; basal and proximal cauline (12–) 25–100 × 6–15 (–25) mm, blade spatulate to oblanceolate, base tapered, margins entire, apex rounded to obtuse or acute; cauline 2–4 pairs, sessile or proximals short-petiolate, 24–70 × 7–20 mm, blade elliptic or oblanceolate to lanceolate or oblong, base tapered to cordate-clasping, margins entire, apex obtuse to acute. Thyrses interrupted, cylindric, 8–20 cm, axis glandular-pubescent, verticillasters 3–7, cymes 1–4-flowered, 2 per node; proximal bracts lanceolate, 13–45 × 4–12 mm; peduncles and pedicels erect, glandular-pubescent. Flowers: calyx lobes lanceolate, 8–10 × 1.4–2.6 mm, glandular-pubescent; corolla blue to lavender or violet, without nectar guides, ampliate, 24–30 mm, glandular-pubescent externally, glabrous internally, tube 8–10 mm, throat gradually inflated, 6–8 mm diam., 2-ridged abaxially; stamens included, filaments glabrous, pollen-sacs parallel, 1.6–1.9 mm, distal 1/3 indehiscent, sides glabrous, sutures denticulate, teeth to 0.1 mm; staminode 13–15 mm, included, 0.4–0.5 mm diam., distal 5–8 mm densely pilose, hairs yellow, to 1.3 mm; style 22–25 mm. Capsules 7–11 × 5–6 mm.
Phenology: Flowering Jun–Aug.
Habitat: Rocky openings, pine-juniper woodlands, pine forests.
Elevation: 2000–2900 m.
Penstemon papillatus is limited to the High Sierra Nevada and Inyo and White mountains in Inyo and Mono counties.
"/4+timescorollathroat" is not declared as a valid unit of measurement for this property.