Penstemon gairdneri


Fl. Bor.-Amer. 2: 99. 1838. (as Pentstemon)

Common names: Gairdner’s beardtongue
Treatment appears in FNA Volume 17. Treatment on page 204. Mentioned on page 183, 186, 201.

Subshrubs. Stems ascending to erect, 6–40 cm, retrorsely hairy, not glaucous. Leaves basal and cauline, alternate or mostly opposite, not leathery, retrorsely hairy; basal and proximal cauline 10–50(–70) × 1–4 mm, blade spatulate to oblanceolate or linear, base tapered, margins entire, revolute, apex rounded to obtuse or acute; cauline 8–12 pairs (or 13–25 leaves when alternate), sessile, 7–35 × 1–3 mm, blade oblanceolate to linear, base tapered, margins entire, apex acute. Thyrses interrupted, cylindric to secund, 2–12 cm, axis glandular-pubescent and retrorsely hairy, verticillasters 3–12, cymes 1(or 2)-flowered, 1 or 2 per node; proximal bracts lanceolate to linear, 5–18 × 0.5–3 mm, margins entire; peduncles and pedicels erect, glandular-pubescent and/or retrorsely hairy. Flowers: calyx lobes lanceolate, 5–8.5 × 1.7–2.7 mm, puberulent and glandular-pubescent; corolla violet to blue or purple, with or without reddish nectar guides, funnelform, 15–22 mm, glandular-pubescent externally, glandular-pubescent internally, tube 3–4 mm, throat gradually inflated, 5–6 mm diam., slightly 2-ridged abaxially; stamens included or longer pair reaching orifice, pollen sacs opposite, navicular to subexplanate, 0.8–1 mm, dehiscing completely, connective splitting, sides glabrous, sutures smooth; staminode 8–11 mm, included, 0.4–0.6 mm diam., tip straight, distal 3–5 mm sparsely to densely pubescent, hairs yellow, to 1 mm; style 10–12 mm. Capsules 5–9 × 3–5.3 mm, glabrous. 2n = 16.


Varieties 2 (2 in the flora).

Following A. Cronquist (1959), two varieties are recognized here.

Selected References



1 Leaves alternate; stems 6–20(–35) cm. Penstemon gairdneri var. gairdneri
1 Leaves opposite, sometimes alternate; stems 20–40 cm. Penstemon gairdneri var. oreganus