Difference between revisions of "Penstemon davidsonii"
Pittonia 2: 241. 1892.
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|name=Penstemon menziesii subsp. davidsonii | |name=Penstemon menziesii subsp. davidsonii | ||
|authority=(Greene) Piper | |authority=(Greene) Piper | ||
+ | |rank=subspecies | ||
}} | }} | ||
|hierarchy=Plantaginaceae;Penstemon;Penstemon subg. Dasanthera;Penstemon sect. Erianthera;Penstemon davidsonii | |hierarchy=Plantaginaceae;Penstemon;Penstemon subg. Dasanthera;Penstemon sect. Erianthera;Penstemon davidsonii | ||
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-->{{#Taxon: | -->{{#Taxon: | ||
name=Penstemon davidsonii | name=Penstemon davidsonii | ||
− | |||
|authority=Greene | |authority=Greene | ||
|rank=species | |rank=species | ||
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|publication year=1892 | |publication year=1892 | ||
|special status=Endemic | |special status=Endemic | ||
− | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/ | + | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/eaa6e58056e40c9ef614d8f47aea294977a1a5e9/coarse_grained_fna_xml/V17/V17_234.xml |
|genus=Penstemon | |genus=Penstemon | ||
|subgenus=Penstemon subg. Dasanthera | |subgenus=Penstemon subg. Dasanthera |
Revision as of 20:08, 16 December 2019
Subshrubs, cespitose. Stems ascending to erect, 4–10(–17) cm, retrorsely hairy or puberulent, not glaucous. Leaves persistent, 5–10 pairs, distals usually distinctly smaller than proximals, short-petiolate or sessile, (5–)10–20(–30) × 4–11 mm, blade elliptic to orbiculate, ovate, or spatulate, base tapered, margins entire or serrulate, apex rounded to obtuse or acute, glabrous or obscurely puberulent, not glaucous. Thyrses continuous, ± secund, 1–6 cm, axis retrorsely hairy proximally, retrorsely hairy and glandular-pubescent distally, verticillasters (1 or)2–7, cymes 1-flowered; proximal bracts round to ovate or lanceolate, 3–12 × 1–6 mm, margins entire; peduncles and pedicels ascending to erect, glandular-pubescent, sometimes also puberulent. Flowers: calyx lobes lanceolate to linear, 7–12(–14) × 2.5–4.3 mm, glandular-pubescent; corolla lavender to bluish lavender, violet, or purple, essentially unlined internally but abaxial ridges usually lavender or white, nearly personate, funnelform, 20–45 mm, glabrous externally, sparsely to moderately white-villous internally abaxially, tube (4–)6–12 mm, throat 7–12 mm diam.; stamens included, pollen sacs 0.9–1.6 mm; staminode 7–14 mm, slightly flattened distally, 0.1–0.2 mm diam., tip straight, distal 4–7 mm sparsely to densely villous, hairs whitish, to 1 mm; style 19–26 mm. Capsules 8–13 × 5–8 mm.
Distribution
w North America.
Discussion
Varieties 3 (3 in the flora).
Penstemon davidsonii occurs mostly at high elevations in the Cascade Range and Sierra Nevada.
Selected References
None.
Lower Taxa
Key
1 | Corollas (30–)34–45 mm; leaf blades elliptic to ovate, sometimes spatulate, margins entire. | Penstemon davidsonii var. praeteritus |
1 | Corollas 20–36 mm; leaf blades spatulate to orbiculate or elliptic, margins serrulate or entire. | > 2 |
2 | Leaf blade margins entire, sometimes serrulate, apices rounded to obtuse. | Penstemon davidsonii var. davidsonii |
2 | Leaf blade margins ± serrulate, apices rounded to obtuse or acute. | Penstemon davidsonii var. menziesii |