Difference between revisions of "Penstemon mucronatus"
Brittonia 31: 234, fig. 10. 1979.
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|name=Penstemon pachyphyllus var. mucronatus | |name=Penstemon pachyphyllus var. mucronatus | ||
|authority=(N. H. Holmgren) Neese | |authority=(N. H. Holmgren) Neese | ||
| + | |rank=variety | ||
}} | }} | ||
|hierarchy=Plantaginaceae;Penstemon;Penstemon subg. Penstemon;Penstemon sect. Coerulei;Penstemon mucronatus | |hierarchy=Plantaginaceae;Penstemon;Penstemon subg. Penstemon;Penstemon sect. Coerulei;Penstemon mucronatus | ||
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|elevation=1500–2500 m. | |elevation=1500–2500 m. | ||
|distribution=Colo.;Utah;Wyo. | |distribution=Colo.;Utah;Wyo. | ||
| − | |discussion=<p>Penstemon mucronatus is known from Moffat and Rio Blanco counties, Colorado, Daggett and Uintah counties, Utah, and Carbon and Sweetwater counties, Wyoming. E. C. Neese (1993) considered it transitional to P. pachyphyllus var. pachyphyllus in northeastern Utah and treated it as a variety of that species. The two taxa often have similar leaf morphologies; P. mucronatus usually is easily distinguished from P. pachyphyllus var. pachyphyllus by its narrower staminode bearing shorter, less tangled hairs at the apex and nectar guides that extend onto the corolla limbs. Flowers of P. mucronatus are in many respects more similar to those of P. osterhoutii than they are to those of P. pachyphyllus. A chromosome count reported for P. pachyphyllus by F. S. Crosswhite and S. Kawano (1965) is referable to P. mucronatus.</p> | + | |discussion=<p><i>Penstemon mucronatus</i> is known from Moffat and Rio Blanco counties, Colorado, Daggett and Uintah counties, Utah, and Carbon and Sweetwater counties, Wyoming. E. C. Neese (1993) considered it transitional to <i>P. pachyphyllus </i>var.<i> pachyphyllus</i> in northeastern Utah and treated it as a variety of that species. The two taxa often have similar leaf morphologies; <i>P. mucronatus</i> usually is easily distinguished from <i>P. pachyphyllus </i>var.<i> pachyphyllus</i> by its narrower staminode bearing shorter, less tangled hairs at the apex and nectar guides that extend onto the corolla limbs. Flowers of <i>P. mucronatus</i> are in many respects more similar to those of <i>P. osterhoutii</i> than they are to those of <i>P. pachyphyllus</i>. A chromosome count reported for <i>P. pachyphyllus</i> by F. S. Crosswhite and S. Kawano (1965) is referable to <i>P. mucronatus</i>.</p> |
|tables= | |tables= | ||
|references= | |references= | ||
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-->{{#Taxon: | -->{{#Taxon: | ||
name=Penstemon mucronatus | name=Penstemon mucronatus | ||
| − | |||
|authority=N. H. Holmgren | |authority=N. H. Holmgren | ||
|rank=species | |rank=species | ||
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|publication year=1979 | |publication year=1979 | ||
|special status=Endemic | |special status=Endemic | ||
| − | |source xml=https:// | + | |source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V17/V17_315.xml |
|genus=Penstemon | |genus=Penstemon | ||
|subgenus=Penstemon subg. Penstemon | |subgenus=Penstemon subg. Penstemon | ||
Latest revision as of 19:31, 5 November 2020
Stems ascending to erect, 10–35(–46) cm, glabrous. Leaves basal and cauline, glabrous; basal and proximal cauline 23–65(–100) × (9–)13–40 mm, blade oblanceolate, base tapered, apex rounded to obtuse or acute; cauline (2–)4–6(–9) pairs, sessile, (8–)20–30 × 8–26 mm, blade ovate to orbiculate, base clasping, apex mucronate. Thyrses interrupted, cylindric, (2–)11–18(–27) cm, axis glabrous, verticillasters 6–9(–15), cymes 2–6-flowered; proximal bracts orbiculate to ovate, 7–28 × 3–26 mm; peduncles and pedicels glabrous. Flowers: calyx lobes ovate, (3–)4.5–6.5 × 1.5–2.3 mm, margins entire or erose, broadly scarious, glabrous; corolla blue to violet, with reddish violet nectar guides, guides sometimes passing onto limb, tubular-funnelform, (10–)13–17(–20) mm, glabrous externally, sparsely white-villous internally abaxially, tube (5–)7–10 mm, throat gradually inflated, 4.5–5.5(–7) mm diam., rounded abaxially; stamens included or longer pair reaching orifice, pollen sacs divergent to opposite, 0.7–1.1 mm, sutures papillate; staminode 7–13 mm, reaching orifice, (0.6–)0.9–1.9 mm diam., tip strongly recurved, distal 2–5 mm moderately to densely pilose, hairs brownish yellow or golden yellow, to 1 mm; style (7–)9–12 mm. Capsules 8–10 × 6–7 mm. 2n = 16.
Phenology: Flowering May–Jun.
Habitat: Sandy or gravelly soils, juniper and pinyon-juniper woodlands.
Elevation: 1500–2500 m.
Distribution
Colo., Utah, Wyo.
Discussion
Penstemon mucronatus is known from Moffat and Rio Blanco counties, Colorado, Daggett and Uintah counties, Utah, and Carbon and Sweetwater counties, Wyoming. E. C. Neese (1993) considered it transitional to P. pachyphyllus var. pachyphyllus in northeastern Utah and treated it as a variety of that species. The two taxa often have similar leaf morphologies; P. mucronatus usually is easily distinguished from P. pachyphyllus var. pachyphyllus by its narrower staminode bearing shorter, less tangled hairs at the apex and nectar guides that extend onto the corolla limbs. Flowers of P. mucronatus are in many respects more similar to those of P. osterhoutii than they are to those of P. pachyphyllus. A chromosome count reported for P. pachyphyllus by F. S. Crosswhite and S. Kawano (1965) is referable to P. mucronatus.
Selected References
None.