Penstemon teucrioides

Greene

Pl. Baker. 3: 23. 1901.

Common names: Germander beardtongue
IllustratedEndemic
Treatment appears in FNA Volume 17. Treatment on page 106. Mentioned on page 99, 107.

Stems prostrate or ascending, 2–10 cm, cinereous, retrorsely hairy, hairs pointed. Leaves not leathery, cinereous, densely retrorsely hairy, hairs pointed; cauline 5–9 pairs, sessile, 4–14 × 0.5–1.4 mm, blade linear, base tapered, apex mucronate, sometimes acuminate. Thyrses continuous, cylindric, 3–15 cm, axis retrorsely hairy to retrorsely cinereous, hairs pointed, verticillasters 1–8, cymes 1 or 2 (or 3) -flowered, 1 per node; proximal bracts linear, 6–15 × 0.6–1.5 mm; peduncles and pedicels ascending to erect, retrorsely cinereous, hairs pointed, and, sometimes, sparsely glandular-pubescent. Flowers: calyx lobes lanceolate, (3–) 4–6 × 0.7–1 mm, narrowly scarious-margined, retrorsely hairy, hairs pointed, and sparsely glandular-pubescent; corolla blue or violet, lined internally abaxially with reddish violet nectar guides, funnelform, 15–19 mm, sparsely white or yellowish lanate internally abaxially, tube 6–7 mm, throat gradually inflated, 4–5.5 mm diam., 2-ridged abaxially; stamens: longer pair reaching orifice, filaments glabrous, pollen-sacs opposite, navicular to subexplanate, 0.7–1 mm, sutures papillate; staminode 8–9 mm, included or reaching orifice, flattened distally, 0.2–0.3 mm diam., tip straight to recurved, distal 6–7 mm pilose, hairs yellowish orange, to 0.7 mm; style 13–16 mm. Capsules 3.3–4.5 × 2.8–3.6 mm. 2n = 16.


Phenology: Flowering May–Jul(–Aug).
Habitat: Silt or gravelly slopes in sagebrush shrublands.
Elevation: 2200–3400 m.

Discussion

Penstemon teucrioides is known from the Gunnison Basin. Populations have been documented in Chaffee, Gunnison, Hinsdale, Park, and Saguache counties. E. O. Wooton and P. C. Standley (1915) cited a specimen from Tierra Amarilla, Rio Arriba County, New Mexico, which appears to be in error. Penstemon teucrioides is most likely confused with P. crandallii but can be distinguished reliably by its densely retrorsely hairy, cinereous leaves, narrowly scarious-margined calyx lobes, and 0.7–1 mm pollen sacs. Penstemon teucrioides also can be mistaken for P. caespitosus; the two species can be distinguished by the indument of stems and leaves.

Selected References

None.

Lower Taxa

None.

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

... more about "Penstemon teucrioides"
acuminate +  and mucronate +
Craig C. Freeman +
Greene +
alternate +, opposite +, whorled +, helical +  and subopposite +
tapered +
Penstemon +
lanceolate;oblanceolate;spatulate;obovate +
not +  and leathery +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
scarious-margined +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
short-tubular +  and short-campanulate +
0.33 cm3.3 mm <br />0.0033 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
0.28 cm2.8 mm <br />0.0028 m <br /> (0.36 cm3.6 mm <br />0.0036 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (1.4 cm14 mm <br />0.014 m <br />) +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.14 cm1.4 mm <br />0.0014 m <br />) +
Germander beardtongue +
yellowish +, white +, violet +  and blue +
salverform +  and tubular-funnelform +
ampliate +  and ventricose-ampliate +
1.5 cm15 mm <br />0.015 m <br /> (1.9 cm19 mm <br />0.019 m <br />) +
scale-like +  and not needlelike +
drupe-like +
2200–3400 m. +
curved +  and straight +
1 +  and 4 +
Silt or gravelly slopes in sagebrush shrublands. +
yellowish orange +
glandular-pubescent +
pointed +
0 cm0 mm <br />0 m <br /> (0.07 cm0.7 mm <br />7.0e-4 m <br />) +
membranous +
terminal +  and axillary +
persistent +  and deciduous +
cauline +, proximal +  and basal +
not leathery +
orbiculate;linear;orbiculate;linear;truncate;oblanceolate;obovate;oblong;elliptic;round;lanceolate;ovate +
erose +  and entire +
glabrate +, hairy +  and glandular-pubescent +
toothed +  and entire +
herbaceous +  and scarious +
axile +  and parietal +
basal +, apical +  and superior +
tenuinucellate +, unitegmic +  and hemitropous +
campylotropous +, hemianatropous +  and anatropous +
ascending +  and erect +
ascending;erect +
5 +  and 4 +
Flowering May–Jul(–Aug). +
navicular-sigmoid +
0.6 cm6 mm <br />0.006 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
minute +
dark-brown +  and black +
angled +  and rounded +
0.11 cm1.1 mm <br />0.0011 m <br /> (0.21 cm2.1 mm <br />0.0021 m <br />) +
Illustrated +  and Endemic +
included +  and exserted +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.03 cm0.3 mm <br />3.0e-4 m <br />) +
reaching orifice +  and included +
0.8 cm8 mm <br />0.008 m <br /> (?) +  and 0.9 cm9 mm <br />0.009 m <br /> (?) +
subalternate +, alternate +, whorled +  and opposite +
climbing +  and scrambling +
sprawling +, creeping +  and prostrate +
ascending;prostrate +
2 cm20 mm <br />0.02 m <br /> (10 cm100 mm <br />0.1 m <br />) +
1.3 cm13 mm <br />0.013 m <br /> (1.6 cm16 mm <br />0.016 m <br />) +
papillate +
denticulate +
Penstemon teucrioides +
Penstemon sect. Caespitosi +
species +
0.4 cm4 mm <br />0.004 m <br /> (0.55 cm5.5 mm <br />0.0055 m <br />) +
2-ridged +  and inflated +
not constricted +
cylindric +
3 cm30 mm <br />0.03 m <br /> (15 cm150 mm <br />0.15 m <br />) +
straight +
0.6 cm6 mm <br />0.006 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
gibbous +  and not spurred +
0.6 cm6 mm <br />0.006 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
subshrub +  and cespitose +