Penstemon pahutensis

N. H. Holmgren

Aliso 7: 351, fig. 1. 1971.

Common names: Pahute Mesa beardtongue
Endemic
Treatment appears in FNA Volume 17. Treatment on page 174. Mentioned on page 157.

Stems ascending to erect, 15–25 (–35) cm, glabrous, not glaucous. Leaves basal and cauline, leathery or not, glabrous, sometimes glaucous; basal and proximal cauline 48–110 × 10–18 mm, blade oblanceolate to elliptic, base tapered, margins entire, apex obtuse to acute; cauline 5–8 pairs, petiolate, 30–80 (–120) × 4–18 mm, blade lanceolate to linear, base tapered, apex acute. Thyrses interrupted or continuous, ± secund, 13–48 cm, axis glabrous, verticillasters 6–14, cymes 2–4 (–8) -flowered, 2 per node; proximal bracts lanceolate, 8–50 (–100) × 2–10 (–20) mm; peduncles and pedicels glabrous. Flowers: calyx lobes ovate to obovate, 3–5 × 1.8–3 mm, glabrous; corolla bluish lavender, with reddish purple nectar guides, ventricose, (17–) 21–26 (–30) mm, glabrous externally, sparsely yellow or white-villous internally abaxially, tube 5–8 mm, throat gradually inflated, not constricted at orifice, 6–10 mm diam., rounded abaxially; stamens: longer pair reaching orifice, pollen-sacs divergent, sigmoid, 1.6–2.2 mm, dehiscing incompletely, proximal 1/3 indehiscent, connective not splitting, sides glabrous, sutures denticulate, teeth to 0.1 mm; staminode 12–15 mm, reaching orifice, 0.3–0.5 mm diam., tip straight, distal 4–6 mm densely pilose, hairs golden yellow, to 1.5 mm; style 17–20 mm. Capsules 8–10 × 5–7 mm. 2n = 16.


Phenology: Flowering Jun–Jul.
Habitat: Loose soils, rocky crevices, sagebrush shrublands, pinyon-juniper woodlands.
Elevation: 1600–2500 m.

Discussion

Penstemon pahutensis is known from Inyo County, California, and Esmeralda and Nye counties, Nevada.

Selected References

None.

Lower Taxa

None.

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

... more about "Penstemon pahutensis"
acute +  and obtuse +
Craig C. Freeman +
N. H. Holmgren +
alternate +, opposite +, whorled +, helical +  and subopposite +
tapered;tapered +
Penstemon +
lanceolate;linear +
not +  and leathery +
ovate;obovate +
short-tubular +  and short-campanulate +
0.8 cm8 mm <br />0.008 m <br /> (1 cm10 mm <br />0.01 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
8 cm80 mm <br />0.08 m <br /> (12 cm120 mm <br />0.12 m <br />) +
3 cm30 mm <br />0.03 m <br /> (8 cm80 mm <br />0.08 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (1.8 cm18 mm <br />0.018 m <br />) +
Pahute Mesa beardtongue +
not personate +, weakly bilabiate +  and strongly bilabiate +
2.6 cm26 mm <br />0.026 m <br /> (3 cm30 mm <br />0.03 m <br />) +
yellow +  and bluish lavender +
white-villous +  and glabrous +
ventricose +
ventricose-ampliate +
2.1 cm21 mm <br />0.021 m <br /> (2.6 cm26 mm <br />0.026 m <br />) +
2-4(-8)-flowered +
scale-like +  and not needlelike +
Calif. +  and Nev. +
drupe-like +
1600–2500 m. +
curved +  and straight +
1 +  and 4 +
Loose soils, rocky crevices, sagebrush shrublands, pinyon-juniper woodlands. +
golden yellow +
0 cm0 mm <br />0 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
membranous +
terminal +  and axillary +
persistent +  and deciduous +
basal +  and cauline +
glaucous +  and glabrous +
not +  and 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 />) +
spreading +, erect +  and ascending +
spreading;erect;ascending +
5 +  and 4 +
Flowering Jun–Jul. +
indehiscent +  and dehiscing +
0.16 cm1.6 mm <br />0.0016 m <br /> (0.22 cm2.2 mm <br />0.0022 m <br />) +
5 cm50 mm <br />0.05 m <br /> (10 cm100 mm <br />0.1 m <br />) +
1 cm10 mm <br />0.01 m <br /> (2 cm20 mm <br />0.02 m <br />) +
0.8 cm8 mm <br />0.008 m <br /> (5 cm50 mm <br />0.05 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (1 cm10 mm <br />0.01 m <br />) +
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 +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
included +  and exserted +
1.2 cm12 mm <br />0.012 m <br /> (?) +  and 1.5 cm15 mm <br />0.015 m <br /> (?) +
short-petiolate +  and petiolate +
25 cm250 mm <br />0.25 m <br /> (35 cm350 mm <br />0.35 m <br />) +
glutinous +
climbing +  and scrambling +
sprawling +, creeping +  and prostrate +
ascending;erect +
cauline +, proximal +  and basal +
not glaucous +  and glabrous +
reduced +
15 cm150 mm <br />0.15 m <br /> (25 cm250 mm <br />0.25 m <br />) +
not +  and leathery +
1.7 cm17 mm <br />0.017 m <br /> (2 cm20 mm <br />0.02 m <br />) +
papillate +
denticulate +
Penstemon subg. Habroanthus +
Penstemon pahutensis +
Penstemon sect. Glabri +
species +
0.6 cm6 mm <br />0.006 m <br /> (1 cm10 mm <br />0.01 m <br />) +
rounded +  and inflated +
not constricted +
secund +, continuous +  and interrupted +
cylindric +
13 cm130 mm <br />0.13 m <br /> (48 cm480 mm <br />0.48 m <br />) +
straight +
0.4 cm4 mm <br />0.004 m <br /> (0.6 cm6 mm <br />0.006 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 +
0.5 cm5 mm <br />0.005 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
petiolate +  and sessile +
cauline +  and proximal +