Penstemon cyanocaulis

Payson

Bot. Gaz. 60: 380. 1915.

Common names: Blue-stem beardtongue
Endemic
Treatment appears in FNA Volume 17. Treatment on page 165. Mentioned on page 158, 161.

Stems ascending to erect, (16–) 20–60 cm, glabrous or ± puberulent proximally, ± glaucous. Leaves basal and cauline, ± leathery or not, glabrous or proximals puberulent proximally or along midveins, ± glaucous; basal and proximal cauline (30–) 50–95 × 10–15 (–28) mm, blade spatulate to oblanceolate, base tapered, margins entire, usually undulate, apex rounded to obtuse; cauline 2–4 pairs, sessile, 20–73 × 4–15 mm, blade lanceolate to elliptic, base truncate to clasping, margins crisped or undulate, apex acute. Thyrses interrupted, secund to subsecund, (4–) 8–31 cm, axis glabrous, verticillasters 5–9 (–12), cymes (1 or) 2–5-flowered, 2 per node; proximal bracts ovate to lanceolate, 15–50 × 3–23 mm; peduncles and pedicels glabrous, peduncles to 18 mm, pedicels 1–7 mm. Flowers: calyx lobes ovate, 3.5–4.5 × 1.4–2 mm, apex acute to acuminate, glabrous; corolla blue to violet, with violet nectar guides, funnelform to weakly ventricose, 14–18 (–20) mm, glabrous or ± glandular externally, glabrous internally, tube 5–8 mm, throat gradually inflated, not constricted at orifice, 5–7 mm diam., rounded abaxially; stamens: longer pair reaching orifice, pollen-sacs divergent, navicular-sigmoid, 1.2–1.7 mm, dehiscing incompletely, proximal 1/4 indehiscent, connective not splitting, sides sparsely to moderately pilose, hairs white, to 0.5 (–0.7) mm, sutures denticulate, teeth to 0.1 mm; staminode: 9–11 mm, reaching orifice, 0.2–0.4 mm diam., tip straight, distal 2–6 mm sparsely pilose, hairs golden yellow, to 0.6 mm; style 9–12 mm. Capsules 6–10 × 4–5 mm.


Phenology: Flowering Apr–Jun.
Habitat: Rocky slopes, pinyon-juniper, oak, and oak-juniper woodlands.
Elevation: 1300–2700 m.

Discussion

Penstemon cyanocaulis is known from Mesa, Montrose, and San Miguel counties, Colorado, and Carbon, Emery, Grand, and San Juan counties, Utah. It has crisped or undulate leaf margins that help distinguish it in the field.

Selected References

None.

Lower Taxa

None.

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

... more about "Penstemon cyanocaulis"
acute +  and acuminate +
Craig C. Freeman +
Payson +
alternate +, opposite +, whorled +, helical +  and subopposite +
truncate;clasping +
tapered +
Penstemon +
lanceolate;elliptic +
not +  and leathery +
3.5mm;4.5mm +
short-tubular +  and short-campanulate +
0.6 cm6 mm <br />0.006 m <br /> (1 cm10 mm <br />0.01 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
2 cm20 mm <br />0.02 m <br /> (7.3 cm73 mm <br />0.073 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
Blue-stem beardtongue +
not personate +, weakly bilabiate +  and strongly bilabiate +
1.8 cm18 mm <br />0.018 m <br /> (2 cm20 mm <br />0.02 m <br />) +
blue +  and violet +
glabrous +  and glandular +
ventricose +
ventricose-ampliate +
1.4 cm14 mm <br />0.014 m <br /> (1.8 cm18 mm <br />0.018 m <br />) +
2-5-flowered +
scale-like +  and not needlelike +
Colo. +  and Utah. +
drupe-like +
1300–2700 m. +
curved +  and straight +
1 +  and 4 +
Rocky slopes, pinyon-juniper, oak, and oak-juniper woodlands. +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.07 cm0.7 mm <br />7.0e-4 m <br />) +
golden yellow +  and white +
0 cm0 mm <br />0 m <br /> (0.06 cm0.6 mm <br />6.0e-4 m <br />) +
membranous +
terminal +  and axillary +
persistent +  and deciduous +
cauline +  and basal +
not +  and leathery +
orbiculate;linear;orbiculate;linear;truncate;oblanceolate;obovate;oblong;elliptic;round;lanceolate;ovate +
glutinous +
puberulent +, glandular-pubescent +  and glabrous +
undulate +  and crisped +
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 +
0.1 cm1 mm <br />0.001 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
spreading;erect;ascending +
0 cm0 mm <br />0 m <br /> (1.8 cm18 mm <br />0.018 m <br />) +
5 +  and 4 +
Flowering Apr–Jun. +
navicular-sigmoid +
indehiscent +  and dehiscing +
0.12 cm1.2 mm <br />0.0012 m <br /> (0.17 cm1.7 mm <br />0.0017 m <br />) +
1.5 cm15 mm <br />0.015 m <br /> (5 cm50 mm <br />0.05 m <br />) +
ovate +  and lanceolate +
0.3 cm3 mm <br />0.003 m <br /> (2.3 cm23 mm <br />0.023 m <br />) +
glaucous +, along midveins +  and puberulent +
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 +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.04 cm0.4 mm <br />4.0e-4 m <br />) +
included +  and exserted +
0.9 cm9 mm <br />0.009 m <br /> (?) +  and 1.1 cm11 mm <br />0.011 m <br /> (?) +
short-petiolate +  and petiolate +
16 cm160 mm <br />0.16 m <br /> (20 cm200 mm <br />0.2 m <br />) +
glutinous +
climbing +  and scrambling +
sprawling +, creeping +  and prostrate +
ascending;erect +
cauline +, proximal +  and basal +
glaucous +, puberulent +  and glabrous +
reduced +
20 cm200 mm <br />0.2 m <br /> (60 cm600 mm <br />0.6 m <br />) +
not +  and leathery +
0.9 cm9 mm <br />0.009 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
papillate +
denticulate +
Penstemon subg. Habroanthus +
Penstemon cyanocaulis +
Penstemon sect. Glabri +
species +
0.5 cm5 mm <br />0.005 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
rounded +  and inflated +
not constricted +
secund +  and interrupted +
4 cm40 mm <br />0.04 m <br /> (8 cm80 mm <br />0.08 m <br />) +
cylindric +
8 cm80 mm <br />0.08 m <br /> (31 cm310 mm <br />0.31 m <br />) +
straight +
0.2 cm2 mm <br />0.002 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 +