Penstemon pachyphyllus

A. Gray ex Rydberg

Fl. Rocky Mts., 770, 1066. 1917.

Common names: Thick-leaf beardtongue
Endemic
Basionym: Penstemon nitidus var. major Bentham in A. P. de Candolle and A. L. P. P. de Candolle Prodr. 10: 323. 1846
Treatment appears in FNA Volume 17. Treatment on page 123. Mentioned on page 112, 117, 121.

Stems ascending to erect, (10–) 15–57 cm, glabrous. Leaves basal and cauline, glabrous; basal and proximal cauline 18–180 × 5–45 (–53) mm, blade spatulate to lanceolate, base tapered, apex rounded to obtuse, acute, or mucronate; cauline 2–5 pairs, short-petiolate or sessile, 15–80 × 7–32 mm, blade obovate, ovate, oblanceolate, or lanceolate, base tapered, clasping, or cordate-clasping, apex acute to rounded or mucronate. Thyrses continuous or interrupted, cylindric, (5–) 9–27 cm, axis glabrous, verticillasters (2–) 4–10, cymes (1–) 3–6-flowered; proximal bracts ovate to lanceolate or oblong, 9–46 × 7–15 mm; peduncles and pedicels glabrous, peduncles to 26 mm. Flowers: calyx lobes ovate to lanceolate, (2.5–) 4–7 × 1.8–2.8 mm, margins entire or erose, broadly scarious, apex acute to acuminate or caudate, glabrous; corolla blue to violet, sometimes lavender, with or without reddish violet nectar guides, tubular-funnelform to ventricose, 12–20 mm, glabrous externally, glabrous internally or sparsely white-villous abaxially, tube 4–6 mm, throat gradually inflated, 5–6 mm diam., rounded abaxially; stamens included or longer pair reaching orifice, pollen-sacs opposite, (0.7–) 1–1.5 mm, sutures smooth or papillate; staminode 8–12 mm, reaching orifice or slightly exserted, (0.2–) 0.5–2 mm diam., tip recurved, prominently bifurcate, distal 4–8 mm densely villous, hairs yellow to golden yellow, to 2.5 mm; style 11–15 mm. Capsules 10–14 × 5–7 mm. Seeds 2–3 mm.

Discussion

Varieties 2 (2 in the flora).

E. C. Neese (1993) considered Penstemon mucronatus transitional to P. pachyphyllus var. pachyphyllus in northeastern Utah. Penstemon mucronatus is distinguished from P. pachyphyllus var. pachyphyllus by its narrower staminodes bearing shorter, less tangled hairs, and its nectar guides extending onto the corolla limbs.

The Havasupai tribe of northwestern Arizona uses leaves of Penstemon pachyphyllus to make a deer call for hunting (D. E. Moerman 1998).

Selected References

None.

Key

1 Staminodes 8–9 × 1–2 mm, distal 6–8 mm densely villous, hairs to 2.5 mm; Utah. Penstemon pachyphyllus var. pachyphyllus
1 Staminodes 10–12 × (0.2–)0.5–1 mm, distal 4–7 mm densely villous, hairs to 1.5 mm; Arizona, Nevada, Utah. Penstemon pachyphyllus var. congestus

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

... more about "Penstemon pachyphyllus"
acute +  and acuminate or caudate +
Craig C. Freeman +
A. Gray ex Rydberg +
glutinous +
alternate +, opposite +, whorled +, helical +  and subopposite +
cordate-clasping +  and clasping +
tapered;tapered +
Penstemon nitidus var. major +
lanceolate;oblanceolate;lanceolate;oblanceolate;ovate;obovate;spatulate;lanceolate +
not +  and leathery +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
ovate;lanceolate +
1.8mm;2.8mm +
short-tubular +  and short-campanulate +
1 cm10 mm <br />0.01 m <br /> (1.4 cm14 mm <br />0.014 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
sessile +  and short-petiolate +
1.5 cm15 mm <br />0.015 m <br /> (8 cm80 mm <br />0.08 m <br />) +
0.7 cm7 mm <br />0.007 m <br /> (3.2 cm32 mm <br />0.032 m <br />) +
Thick-leaf beardtongue +
not personate +  and bilabiate +
blue +  and violet +
white-villous +, or +  and glabrous +
rounded +, inflated +, tubular-funnelform +  and ventricose +
ampliate +
0.5 cm5 mm <br />0.005 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
(1-)3-6-flowered +
0.4 cm4 mm <br />0.004 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
scale-like +  and not needlelike +
Ariz. +, Nev. +  and Utah +
drupe-like +
curved +  and straight +
1 +  and 4 +
yellow +  and golden yellow +
0 cm0 mm <br />0 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
membranous +
terminal +  and axillary +
persistent +  and deciduous +
basal +  and cauline +
orbiculate;linear;orbiculate;linear;truncate;oblanceolate;obovate;oblong;elliptic;round;lanceolate;ovate +
erose +  and entire +
glutinous +
glandular-pubescent +  and glabrous +
toothed +  and entire +
axile +  and parietal +
basal +, apical +  and superior +
tenuinucellate +, unitegmic +  and hemitropous +
campylotropous +, hemianatropous +  and anatropous +
ascending +  and erect +
ascending;erect +
0 cm0 mm <br />0 m <br /> (2.6 cm26 mm <br />0.026 m <br />) +
5 +  and 4 +
0.07 cm0.7 mm <br />7.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
navicular-sigmoid +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
0.9 cm9 mm <br />0.009 m <br /> (4.6 cm46 mm <br />0.046 m <br />) +
ovate +  and lanceolate or oblong +
0.7 cm7 mm <br />0.007 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
Fl. Rocky Mts., +
minute +
dark-brown +  and brown +
disciform +, angled-elongate +  and angled +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
0.8 cm8 mm <br />0.008 m <br /> (?) +  and 1.2 cm12 mm <br />0.012 m <br /> (?) +
short-petiolate +  and petiolate +
10 cm100 mm <br />0.1 m <br /> (15 cm150 mm <br />0.15 m <br />) +
climbing +  and scrambling +
sprawling +, creeping +  and prostrate +
ascending;erect +
cauline +, proximal +  and basal +
reduced +
15 cm150 mm <br />0.15 m <br /> (57 cm570 mm <br />0.57 m <br />) +
leathery +
1.1 cm11 mm <br />0.011 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
papillate +  and smooth +
denticulate +
Penstemon pachyphyllus +
Penstemon sect. Coerulei +
species +
2-ridged +, rounded +  and inflated +
not constricted +
interrupted +  and continuous +
5 cm50 mm <br />0.05 m <br /> (9 cm90 mm <br />0.09 m <br />) +
cylindric +
9 cm90 mm <br />0.09 m <br /> (27 cm270 mm <br />0.27 m <br />) +
straight +
bifurcate +
gibbous +  and not spurred +
short-petiolate +  and sessile +
cauline +  and proximal +