Penstemon rupicola |
Penstemon subg. Dasanthera |
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cliff beardtongue, cliff penstemon, rock penstemon |
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Habit | Subshrubs, cespitose. | |
Stems | ascending to erect, 3–16 cm, puberulent to pubescent, not glaucous. |
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Leaves | persistent, 3–8 pairs, distals usually distinctly smaller than proximals, short-petiolate or sessile, 4–22 × 3–14 mm, blade round to elliptic or spatulate, base tapered to cuneate, margins ± serrate, apex rounded to obtuse, rarely acute, glabrous or hairy, usually glaucous. |
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Thyrses | continuous, ± secund, 1–3 cm, axis hairy proximally, pubescent or glandular-pubescent distally, verticillasters 1–3, cymes 1-flowered; proximal bracts elliptic to ovate, 3–9 × 2–6 mm; peduncles and pedicels ascending to erect, glandular-pubescent. |
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Flowers | calyx lobes lanceolate-elliptic to oblong, 6–11 × 2–2.8 mm, glandular-pubescent; corolla pink to red, pinkish lavender, or rose red, essentially unlined internally but abaxial ridges usually white, not personate, funnelform, 25–36 mm, glabrous externally, glabrous internally or sparsely white-lanate abaxially, tube 8–12 mm, throat 6–8 mm diam.; stamens: longer pair exserted, pollen sacs 1–1.5 mm; staminode 13–15 mm, slightly flattened distally, 0.1 mm diam., tip straight, glabrous or distal 1–2 mm sparsely villous, hairs yellow, to 0.8 mm; style 26–30 mm. |
pollen sacs usually explanate, dehiscing completely, connective splitting, sides usually densely lanate, (subexplanate, sides glabrous in P. personatus), sutures smooth; staminode included, length usually 1/3–3/4 times corolla throat. |
Capsules | 7–9 × 5–7 mm. |
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Seeds | angled, wings absent or narrow. |
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2n | = 16. |
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Penstemon rupicola |
Penstemon subg. Dasanthera |
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Phenology | Flowering Jun–Jul. | |
Habitat | Cliffs, rock outcrops. | |
Elevation | 60–2400 m. (200–7900 ft.) | |
Distribution |
CA; OR; WA
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w North America |
Discussion | Penstemon rupicola occurs largely in the Siskiyou Mountains and Cascade Range from northern California to northern Washington. It is partly sympatric with and forms hybrids with P. cardwellii, P. davidsonii var. davidsonii, and P. fruticosus var. fruticosus (A. D. Every 1977). Hybrids between P. rupicola and P. davidsonii var. davidsonii are encountered frequently in the vicinity of Crater Lake National Park and Mt. Hood (Every). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Species 10 (10 in the flora). Subgenus Dasanthera appears to be the basal lineage in the clade corresponding to Penstemon (A. D. Wolfe et al. 2006). As circumscribed here, subg. Dasanthera comprises a single section, sect. Erianthera. Morphologic and molecular data indicate that the persistent-leaved lineage of the Sierra-Cascade is derived from the mostly deciduous-leaved lineage of the Rocky Mountains (A. D. Every 1977; S. L. Datwyler and Wolfe 2004). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 17, p. 92. | FNA vol. 17, p. 85. |
Parent taxa | Plantaginaceae > Penstemon > subg. Dasanthera > sect. Erianthera | Plantaginaceae > Penstemon |
Sibling taxa | ||
Subordinate taxa | ||
Synonyms | P. newberryi var. rupicola | Dasanthera |
Name authority | (Piper) Howell: Fl. N.W. Amer., 510. (1901) — (as Pentstemon) | (Rafinesque) Pennell: Contr. U.S. Natl. Herb. 20: 327. (1920) |
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