Penstemon lemhiensis

(D. D. Keck) D. D. Keck & Cronquist

Brittonia 8: 248. 1957.

Common names: Lemhi beardtongue
Endemic
Basionym: Penstemon speciosus subsp. lemhiensis D. D. Keck
Treatment appears in FNA Volume 17. Treatment on page 172. Mentioned on page 159.
Revision as of 02:28, 29 July 2019 by FNA>Volume Importer
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Stems ascending to erect, 25–80 cm, retrorsely hairy, not glaucous. Leaves basal and cauline, not leathery, retrorsely hairy, not glaucous; basal and proximal cauline (35–)50–160 × (5–)8–24 mm, blade oblanceolate to lanceolate, base tapered, margins entire, apex obtuse to acute; cauline 4–8 pairs, short-petiolate or sessile, 25–85(–125) × 6–15 mm, blade elliptic to lanceolate, base tapered to truncate, apex acute, rarely obtuse. Thyrses interrupted or continuous, cylindric, 7–30 cm, axis retrorsely hairy proximally, mostly glandular-pubescent distally, verticillasters 3–7(–9), cymes 2–8(–10)-flowered, 2 per node; proximal bracts lanceolate, 18–95 × 5–20 mm; peduncles and pedicels retrorsely hairy. Flowers: calyx lobes ovate to lanceolate, (4.8–)6–11 × 2.2–3.5 mm, margins erose, glabrous or sparsely glandular, sometimes also sparsely puberulent; corolla violet to blue, without nectar guides, ventricose, 25–35 mm, glabrous externally, glabrous internally, tube 7–10 mm, throat gradually inflated, not constricted at orifice, 7–11 mm diam., 2-ridged abaxially; stamens included, pollen sacs divergent to nearly opposite, sigmoid, 1.8–2.2 mm, dehiscing incompletely, proximal 1/5–1/4 indehiscent, connective not splitting, sides sparsely hispid, hairs white, to 0.3 mm, sutures denticulate, teeth to 0.1 mm; staminode 14–16 mm, included, 0.7–0.8 mm diam., tip straight, glabrous; style (11–)15–22 mm. Capsules 8–11 × 5–6 mm.


Phenology: Flowering Jun–Jul.
Habitat: Montane grasslands, sagebrush shrublands, pine and pine-fir woodlands.
Elevation: 1200–2500 m.

Discussion

Penstemon lemhiensis is known from the Central Rocky Mountains in east-central Idaho (Lemhi County) and southwestern Montana (Beaverhead, Deer Lodge, Ravalli, and Silver Bow counties).

Selected References

None.

Lower Taxa

None.
... more about "Penstemon lemhiensis"
Craig C. Freeman +
(D. D. Keck) D. D. Keck & Cronquist +
Penstemon speciosus subsp. lemhiensis +
Lemhi beardtongue +
Idaho +  and Mont. +
1200–2500 m. +
Montane grasslands, sagebrush shrublands, pine and pine-fir woodlands. +
Flowering Jun–Jul. +
Penstemon subg. Habroanthus +
Penstemon lemhiensis +
Penstemon sect. Glabri +
species +