Penstemon gairdneri |
Penstemon gairdneri var. gairdneri |
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Gairdner's beardtongue, Gairdner's penstemon |
Gairdner's beardtongue, Gairdner's penstemon |
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Habit | Subshrubs. | |||||
Stems | ascending to erect, 6–40 cm, retrorsely hairy, not glaucous. |
6–20(–35) cm. |
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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. |
alternate. |
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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. |
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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. |
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Capsules | 5–9 × 3–5.3 mm, glabrous. |
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2n | = 16. |
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Penstemon gairdneri |
Penstemon gairdneri var. gairdneri |
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Phenology | Flowering (Apr–)May–Jun. | |||||
Habitat | Rock outcrops, sagebrush shrublands, prairies. | |||||
Elevation | 100–1800 m. (300–5900 ft.) | |||||
Distribution |
ID; OR; WA
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OR; WA |
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Discussion | Varieties 2 (2 in the flora). Following A. Cronquist (1959), two varieties are recognized here. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
D. D. Keck (1940b) recognized three subspecies of Penstemon gairdneri: subsp. gairdneri, subsp. hians, and subsp. oreganus. He distinguished the two alternate-leaved subspecies (subsp. gairdneri and subsp. hians) on the basis of corolla color (rose purple versus lavender-purple with blue limb, respectively) and limb size (15–20 mm diam. versus 12–14 mm diam., respectively), acknowledging considerable variation in limb size in the former. Variety gairdneri occurs in eastern Oregon and central Washington. Its range overlaps with that of var. oreganus in southeastern Oregon. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 17, p. 204. | FNA vol. 17, p. 204. | ||||
Parent taxa | Plantaginaceae > Penstemon > subg. Penstemon > sect. Penstemon | Plantaginaceae > Penstemon > subg. Penstemon > sect. Penstemon > Penstemon gairdneri | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | P. gairdneri subsp. hians | |||||
Name authority | Hooker: Fl. Bor.-Amer. 2: 99. (1838) — (as Pentstemon) | unknown | ||||
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