Penstemon glaucinus


Notul. Nat. Acad. Nat. Sci. Philadelphia 71: 10. 1941.

Common names: Blue-leaf beardtongue
Treatment appears in FNA Volume 17. Treatment on page 205. Mentioned on page 183, 188, 189.

Herbs. Stems ascending to erect, 26–45 cm, glabrous, glaucous. Leaves basal and cauline, ± leathery or not, glabrous, glaucous; basal and proximal cauline 15–60 × 7–13 mm, blade spatulate to elliptic, base tapered, margins entire, apex rounded to obtuse or acute; cauline 2–4 pairs, sessile or proximals short-petiolate, 26–55 × 7–14 mm, blade oblanceolate to oblong or lanceolate, base truncate to clasping, margins entire, apex obtuse to acute. Thyrses interrupted, cylindric, 8–22 cm, axis glandular-pubescent, verticillasters 2–8, cymes 3–6-flowered, 2 per node; proximal bracts lanceolate, 16–40 × 2–14 mm, margins entire; peduncles and pedicels ascending to erect, pedicels glandular-pubescent, sometimes peduncles glabrous. Flowers: calyx lobes ovate to lanceolate, 2.4–5.5 × 1–2 mm, glandular-pubescent; corolla violet, without nectar guides, tubular-funnelform, 12–15 mm, glandular-pubescent externally, moderately yellow-pilose internally abaxially, tube 3–4 mm, throat slightly inflated, 3.5–5 mm diam., 2-ridged abaxially; stamens included, pollen sacs opposite, navicular, 0.7–1 mm, dehiscing completely, connective splitting, sides glabrous, sutures papillate; staminode 6–8 mm, included, 0.3–0.5 mm diam., tip straight to slightly recurved, distal 1–2 mm densely pilose, hairs golden yellow, to 0.5 mm, or glabrous; style 8–10 mm. Capsules 5–7 × 3–4 mm, glabrous.

Phenology: Flowering Jun–Aug.
Habitat: Clearings in pine and pine-fir forests.
Elevation: 1900–2100 m.


Penstemon glaucinus is known only from Klamath and Lake counties.

Selected References


Lower Taxa