Penstemon scapoides

D. D. Keck
Univ. Calif. Publ. Bot. 16: 379, fig. 4. 1932.
Common names: Pinyon beardtongue
Treatment appears in FNA Volume 17. Treatment on page 243. Mentioned on page 230.

Herbs. Stems erect, 15–45(–60) cm, glabrous, glaucous. Leaves basal and cauline, opposite, hirsute, hairs pointed, not glaucous; basal and proximal cauline 15–30(–60) × 4–10(–14) mm, blade ovate to elliptic, base tapered, margins entire, apex rounded to acute; cauline 2 or 3 pairs, petiolate or sessile, 8–25(–45) × 1–3 mm, blade spatulate to oblanceolate or linear, base tapered, margins entire, apex rounded to acute. Thyrses interrupted, cylindric, 4–24 cm, axis glandular-pubescent, verticillasters 2–4, cymes 1–4-flowered, 1 or 2 per node; proximal bracts subulate to lanceolate or linear, 4–35 × 1–3 mm; peduncles and pedicels ascending to erect, glandular-pubescent. Flowers: calyx lobes oblong to ovate, 3–4.5(–5) × 0.9–2 mm, glandular-pubescent; corolla lavender to violet or purple, with or without faint reddish purple nectar guides, ventricose, 25–34 mm, glandular-pubescent externally, yellow-lanate internally abaxially, tube 6–9 mm, throat gradually inflated, 6–8 mm diam., 2-ridged abaxially; stamens included, filaments glabrous, pollen sacs nearly parallel, 1.4–1.5(–1.7) mm, distal 1/2 indehiscent, sides glabrous, sutures denticulate, teeth to 0.1 mm; staminode 15–19 mm, included, 0.2–0.3 mm diam., distal 4–8 mm sparsely pilose, hairs yellow, to 0.7 mm; style 20–29 mm. Capsules 6–10 × 4–6 mm. 2n = 16.

Phenology: Flowering Jun–Aug.
Habitat: Sagebrush shrublands, pine-juniper and pine woodlands.
Elevation: 2000–3100 m.


Penstemon scapoides is known from the Inyo, Last Chance, and White mountains in Inyo County.

Selected References


Lower Taxa