Penstemon longiflorus

(Pennell) S. L. Clark

Great Basin Naturalist 35: 434. 1976.

Common names: Long-flower beardtongue
Endemic
Basionym: Penstemon cyananthus subsp. longiflorus Pennell Contr. U.S. Natl. Herb. 20: 353. 1920
Treatment appears in FNA Volume 17. Treatment on page 172. Mentioned on page 161, 163.

Stems ascending to erect, (11–) 20–60 cm, ± puberulent proximally, glabrous distally, not glaucous. Leaves basal and cauline, not leathery, proximals ± puberulent, distals glabrous, not glaucous; basal and proximal cauline (24–) 40–90 (–120) × 6–20 (–30) mm, blade obovate, base tapered, margins entire, apex obtuse to acute; cauline 3–5 pairs, sessile, (25–) 35–70 × 8–23 mm, blade ovate to lanceolate or elliptic, base tapered to clasping, apex acute, rarely obtuse. Thyrses interrupted, secund, 7–21 cm, axis glabrous, verticillasters 3–6, cymes 1-flowered or 2 (or 3) -flowered, 2 per node; proximal bracts ovate to lanceolate, 5–28 × 2.5–24 mm; peduncles and pedicels glabrous, peduncles to 26 mm, pedicels 1–8 (–12) mm. Flowers: calyx lobes ovate, 4.5–7 × 2.5–3 mm, apex acute to acuminate, glabrous; corolla blue to violet, without nectar guides, ventricose, (20–) 24–30 (–32) mm, glabrous externally, glabrous internally, tube 8–11 mm, throat gradually inflated, not constricted at orifice, 8–10 (–12) mm diam., 2-ridged abaxially; stamens: longer pair reaching orifice, pollen-sacs divergent, rarely nearly opposite, sigmoid, 1.8–2.4 (–2.8) mm, dehiscing incompletely, proximal 1/5 indehiscent, connective not splitting, sides sparsely hispid, hairs white, to 0.3 mm, sutures denticulate, teeth to 0.1 mm; staminode 14–16 mm, included, 0.6–1 mm diam., tip straight to recurved, distal 0.5–1 mm moderately pilose, hairs yellow, to 0.8 mm, remaining distal 3–4 mm with scattered yellow hairs; style 18–22 mm. Capsules 8–14 × 6–10 mm. 2n = 16.


Phenology: Flowering Jun–Jul.
Habitat: Sagebrush shrublands, Gambel oak and mountain mahogany woodlands.
Elevation: 1800–2700 m.

Discussion

Penstemon longiflorus is known from Beaver, Juab, Millard, Piute, Sevier, and Tooele counties (E. C. Neese and N. D. Atwood 2003). The species is most often confused with the partially sympatric P. cyananthus.

Selected References

None.

Lower Taxa

None.

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

... more about "Penstemon longiflorus"
acute +  and acuminate +
Craig C. Freeman +
(Pennell) S. L. Clark +
alternate +, opposite +, whorled +, helical +  and subopposite +
tapered;tapered +
Penstemon cyananthus subsp. longiflorus +
ovate;lanceolate or elliptic +
not +  and leathery +
short-tubular +  and short-campanulate +
0.8 cm8 mm <br />0.008 m <br /> (1.4 cm14 mm <br />0.014 m <br />) +
0.6 cm6 mm <br />0.006 m <br /> (1 cm10 mm <br />0.01 m <br />) +
2.5 cm25 mm <br />0.025 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
3.5 cm35 mm <br />0.035 m <br /> (7 cm70 mm <br />0.07 m <br />) +
0.8 cm8 mm <br />0.008 m <br /> (2.3 cm23 mm <br />0.023 m <br />) +
Long-flower beardtongue +
not personate +, weakly bilabiate +  and strongly bilabiate +
3 cm30 mm <br />0.03 m <br /> (3.2 cm32 mm <br />0.032 m <br />) +
blue +  and violet +
ventricose +
ventricose-ampliate +
2.4 cm24 mm <br />0.024 m <br /> (3 cm30 mm <br />0.03 m <br />) +
2-flowered +  and 1-flowered +
scale-like +  and not needlelike +
not glaucous;glabrous +
drupe-like +
1800–2700 m. +
curved +  and straight +
1 +  and 4 +
Sagebrush shrublands, Gambel oak and mountain mahogany woodlands. +
yellow +  and white +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
membranous +
terminal +  and axillary +
persistent +  and deciduous +
cauline +  and basal +
not leathery +
orbiculate;linear;orbiculate;linear;truncate;oblanceolate;obovate;oblong;elliptic;round;lanceolate;ovate +
glutinous +
puberulent +, glandular-pubescent +  and glabrous +
lacerate +
axile +  and parietal +
basal +, apical +  and superior +
tenuinucellate +, unitegmic +  and hemitropous +
campylotropous +, hemianatropous +  and anatropous +
0 cm0 mm <br />0 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
0.8 cm8 mm <br />0.008 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
spreading +, erect +  and ascending +
0.1 cm1 mm <br />0.001 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
spreading;erect;ascending +
0 cm0 mm <br />0 m <br /> (2.6 cm26 mm <br />0.026 m <br />) +
5 +  and 4 +
Flowering Jun–Jul. +
opposite +  and divergent +
0.24 cm2.4 mm <br />0.0024 m <br /> (0.28 cm2.8 mm <br />0.0028 m <br />) +
indehiscent +  and dehiscing +
0.18 cm1.8 mm <br />0.0018 m <br /> (0.24 cm2.4 mm <br />0.0024 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (2.8 cm28 mm <br />0.028 m <br />) +
ovate +  and lanceolate +
0.25 cm2.5 mm <br />0.0025 m <br /> (2.4 cm24 mm <br />0.024 m <br />) +
Great Basin Naturalist +
minute +
tan +  and brown or dark-brown +
angled +  and angled-elongate +
0.09 cm0.9 mm <br />9.0e-4 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
papillate +
exserted +  and included +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
1.4 cm14 mm <br />0.014 m <br /> (?) +  and 1.6 cm16 mm <br />0.016 m <br /> (?) +
short-petiolate +  and petiolate +
11 cm110 mm <br />0.11 m <br /> (20 cm200 mm <br />0.2 m <br />) +
glutinous +
climbing +  and scrambling +
sprawling +, creeping +  and prostrate +
ascending;erect +
cauline +, proximal +  and basal +
not glaucous +, glabrous +  and puberulent +
reduced +
20 cm200 mm <br />0.2 m <br /> (60 cm600 mm <br />0.6 m <br />) +
not +  and leathery +
1.8 cm18 mm <br />0.018 m <br /> (2.2 cm22 mm <br />0.022 m <br />) +
papillate +
denticulate +
Penstemon subg. Habroanthus +
Penstemon longiflorus +
Penstemon sect. Glabri +
species +
0.8 cm8 mm <br />0.008 m <br /> (1 cm10 mm <br />0.01 m <br />) +
2-ridged +  and inflated +
not constricted +
secund +  and interrupted +
cylindric +
7 cm70 mm <br />0.07 m <br /> (21 cm210 mm <br />0.21 m <br />) +
straight +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
smooth +  and papillate +
0 cm0 mm <br />0 m <br /> (0.01 cm0.1 mm <br />1.0e-4 m <br />) +
gibbous +  and not spurred +
0.8 cm8 mm <br />0.008 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
petiolate +  and sessile +
cauline +  and proximal +