Penstemon petiolatus

Brandegee

Bot. Gaz. 27: 455. 1899.

Common names: Petiolate beardtongue
IllustratedEndemic
Treatment appears in FNA Volume 17. Treatment on page 228. Mentioned on page 131, 225.

Stems 5–25 (–40) cm. Leaves: cauline 2–4 pairs, 14–30 (–35) × 6–17 mm, base tapered to cuneate, margins dentate to serrate-dentate, apex obtuse to acute. Thyrses 3–6 cm, verticillasters 2–6, cymes 1–3 (–5) -flowered; proximal bracts ovate to lanceolate, 6–25 × 2–14 mm; peduncles and pedicels puberulent and sparsely glandular-pubescent, especially distally. Flowers: calyx lobes lanceolate, 4.5–6 × 1.2–1.9 (–2.1) mm; corolla with violet nectar guides, 13–17 mm, sparsely glandular-pubescent externally, sparsely whitish or yellowish villous internally abaxially, tube 5–6 mm, throat 4–5 mm diam.; stamens: pollen-sacs 0.5–0.9 mm; staminode 10–11 mm; style 9–13 mm. Capsules 5–7 × 4–5 mm.


Phenology: Flowering May–Jun.
Habitat: Crevices in limestone outcrops, desert shrub communities, juniper woodlands.
Elevation: 1000–1700 m.

Discussion

Penstemon petiolatus occurs in the Beaver Dam and Virgin mountains in northwestern Mohave County, Arizona, the Charleston Mountains and Sheep Range in Clark County, Nevada, and the Beaver Dam Mountains in southwestern Washington County, Utah. Penstemon calcareus M. E. Jones is an illegitimate, later homonym that applies here.

Selected References

None.

Lower Taxa

None.

"/4+timescorollathroat" is not declared as a valid unit of measurement for this property.

... more about "Penstemon petiolatus"
obtuse +  and acute +
Craig C. Freeman +
Brandegee +
puberulent +
alternate +, opposite +, whorled +, helical +  and subopposite +
tapered;cuneate +
Penstemon +
not +  and leathery +
0.19 cm1.9 mm <br />0.0019 m <br /> (0.21 cm2.1 mm <br />0.0021 m <br />) +
1.2mm;1.9mm +
short-tubular +  and short-campanulate +
0.5 cm5 mm <br />0.005 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
sessile +  and petiolate +
3 cm30 mm <br />0.03 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
1.4 cm14 mm <br />0.014 m <br /> (3 cm30 mm <br />0.03 m <br />) +
0.6 cm6 mm <br />0.006 m <br /> (1.7 cm17 mm <br />0.017 m <br />) +
Petiolate beardtongue +
not personate +  and bilabiate +
yellowish +  and whitish +
villous +  and glandular-pubescent +
ventricose +
ventricose-ampliate +  and ampliate +
1.3 cm13 mm <br />0.013 m <br /> (1.7 cm17 mm <br />0.017 m <br />) +
1-3(-5)-flowered +
scale-like +  and not needlelike +
Ariz. +, Nev. +  and Utah. +
drupe-like +
1000–1700 m. +
curved +  and straight +
1 +  and 4 +
Crevices in limestone outcrops, desert shrub communities, juniper woodlands. +
membranous +
terminal +  and axillary +
persistent +  and deciduous +
glaucous +, scabrous +  and glabrate +
not +  and leathery +
orbiculate;linear;orbiculate;linear;truncate;oblanceolate;obovate;oblong;elliptic;round;lanceolate;ovate +
glabrous +  and glandular-pubescent +
dentate to serrate-dentate +
axile +  and parietal +
basal +, apical +  and superior +
tenuinucellate +, unitegmic +  and hemitropous +
campylotropous +, hemianatropous +  and anatropous +
spreading +  and ascending +
glandular-pubescent +  and puberulent +
spreading;ascending +
glandular-pubescent +  and puberulent +
5 +  and 4 +
Flowering May–Jun. +
navicular-sigmoid +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.09 cm0.9 mm <br />9.0e-4 m <br />) +
0.6 cm6 mm <br />0.006 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
ovate +  and lanceolate +
0.2 cm2 mm <br />0.002 m <br /> (1.4 cm14 mm <br />0.014 m <br />) +
minute +
dark-brown +  and black +
0.09 cm0.9 mm <br />9.0e-4 m <br /> (0.12 cm1.2 mm <br />0.0012 m <br />) +
Illustrated +  and Endemic +
exserted +  and included +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
1 cm10 mm <br />0.01 m <br /> (?) +  and 1.1 cm11 mm <br />0.011 m <br /> (?) +
subalternate +, alternate +, whorled +  and opposite +
25 cm250 mm <br />0.25 m <br /> (40 cm400 mm <br />0.4 m <br />) +
climbing +  and scrambling +
sprawling +, creeping +  and prostrate +
decumbent;ascending;decumbent;ascending;erect;prostrate +
glaucous +, scabrous +  and puberulent +
5 cm50 mm <br />0.05 m <br /> (25 cm250 mm <br />0.25 m <br />) +
0.9 cm9 mm <br />0.009 m <br /> (1.3 cm13 mm <br />0.013 m <br />) +
papillate +
denticulate +
Penstemon petiolatus +
Penstemon sect. Petiolati +
species +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
rounded +  and inflated +
not constricted +
cylindric +
3 cm30 mm <br />0.03 m <br /> (6 cm60 mm <br />0.06 m <br />) +
straight +
gibbous +  and not spurred +
0.5 cm5 mm <br />0.005 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
subshrub +  and shrub +