Penstemon atwoodii

S. L. Welsh

Great Basin Naturalist 35: 378. 1976.

Common names: Atwood’s beardtongue
Treatment appears in FNA Volume 17. Treatment on page 128. Mentioned on page 125, 126, 129.

Stems ascending to erect, 14–35(–50) cm, glabrous or sparsely retrorsely hairy proximally, usually sparsely glandular-pubescent distally. Leaves basal and cauline, leathery or not, glabrous or sparsely retrorsely hairy proximally adaxially; basal and proximal cauline petiolate, 30–80(–100) × 6–12 mm, blade oblanceolate to lanceolate, base tapered, margins entire or obscurely serrate, apex obtuse to acute or mucronate; cauline 3 or 4 pairs, sessile, 28–78 × 3–7 mm, blade oblanceolate to lanceolate, base attenuate to clasping, margins entire, apex obtuse to acute. Thyrses interrupted, cylindric, (3–)7–24 cm, axis glandular-pubescent, verticillasters 3–8, cymes 3–12-flowered, 2 per node; proximal bracts lanceolate to linear, 22–65 × 2–10 mm; peduncles and pedicels glandular-pubescent. Flowers: calyx lobes lanceolate, 6–8(–9) × 1.5–2 mm, glandular-pubescent; corolla blue to lavender, with dark violet nectar guides, bilabiate, tubular-funnelform, 10–13 mm, sparsely to moderately yellow-lanate internally abaxially, tube 4–5 mm, throat gradually inflated, not constricted at orifice, 3–5 mm diam., rounded abaxially; stamens reaching orifice or longer pair exserted, pollen sacs opposite, navicular, 0.9–1.5 mm, dehiscing completely, sutures papillate; staminode 6–8 mm, exserted, 0.3–0.4 mm diam., tip straight, distal 4–5 mm moderately to densely retrorsely-pubescent, hairs golden yellow, to 0.6 mm; style 6–8 mm. Capsules 8–12 × 4–7 mm.

Phenology: Flowering May–Jun.
Habitat: Pinyon-juniper woodlands.
Elevation: 1600–2400 m.


According to Welsh, Penstemon atwoodii is known only from the Kaiparowits Plateau of eastern Garfield and Kane counties.

Selected References


Lower Taxa