Penstemon attenuatus

Douglas ex Lindley

Edwards’s Bot. Reg. 15: plate 1295. 1830.

Common names: Taper-leaf beardtongue
Endemic
Treatment appears in FNA Volume 17. Treatment on page 193. Mentioned on page 189, 190, 194, 204.

Herbs. Stems ascending to erect, (2–) 5–70 (–90) cm, glabrous or retrorsely hairy, not glaucous. Leaves basal and cauline, not leathery, glabrous or puberulent; basal and proximal cauline (30–) 55–90 (–150) × 5–20 (–40) mm, blade spatulate to obovate or elliptic, base tapered, margins entire, rarely denticulate, apex rounded to obtuse or acute; cauline 2–5 (–7) pairs, sessile or proximals short to long-petiolate, 15–90 (–130) × 2–25 (–38) mm, blade usually lanceolate, proximals sometimes oblanceolate, base tapered to clasping, margins entire, rarely serrate or dentate, apex acute, sometimes obtuse. Thyrses interrupted, cylindric, 3–27 cm, axis moderately glandular-pubescent, verticillasters 2–7, cymes (1 or) 2–8-flowered, 2 per node; proximal bracts lanceolate, 15–55 (–80) × 2–15 (–28) mm, margins entire or ± serrate to dentate; peduncles and pedicels erect, glandular-pubescent. Flowers: calyx lobes ovate to obovate, ovate-oblong, or lanceolate, 3.2–7.5 × 0.9–2.6 mm, margins erose or lacerate, apex acuminate to short-caudate or long-acuminate, glandular-pubescent; corolla light blue to violet, bluish purple, or pinkish blue, rarely light yellow or whitish, with reddish purple nectar guides, tubular-funnelform, 7–20 mm, glandular-pubescent externally, moderately white-lanate internally abaxially, tube 4–5 mm, throat slightly inflated, 3–5 (–6) mm diam., 2-ridged abaxially; stamens included, pollen-sacs opposite, navicular to slightly saccate, 0.6–1.2 mm, dehiscing completely or incompletely, distal 1/5 or less sometimes indehiscent, connective splitting or not, sides glabrous, sutures smooth or papillate; staminode 7–9 mm, reaching orifice or slightly exserted, 0.3–0.4 mm diam., tip straight to slightly recurved, distal 1–3 mm ± pilose, hairs yellow, to 1.2 mm; style 8–12 mm. Capsules 4–8 × 2–5 mm, glabrous. 2n = 48.

Distribution

Idaho, Mont., Oreg., Wash., Wyo.

Discussion

Varieties 4 (4 in the flora).

Selected References

None.

Key

1 Pollen sacs dehiscing incompletely, distal 1/5 or less usually indehiscent, connectives not splitting, sutures papillate. Penstemon attenuatus var. militaris
1 Pollen sacs dehiscing completely, connectives splitting, sutures smooth, sometimes ± papillate. > 2
2 Corollas 7–12 mm; calyx lobes lanceolate. Penstemon attenuatus var. palustris
2 Corollas 12–20 mm; calyx lobes ovate, obovate, ovate-oblong, or lanceolate. > 3
3 Stems (22–)30–70(–90) cm; corollas light blue to violet, rarely light yellow or whitish, 14–20 mm; calyx lobe margins erose. Penstemon attenuatus var. attenuatus
3 Stems (2–)5–40 cm; corollas bluish purple, 12–16 mm; calyx lobe margins erose or lacerate. Penstemon attenuatus var. pseudoprocerus

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

... more about "Penstemon attenuatus"
glandular-pubescent +
acuminate +  and short-caudate or long-acuminate +
Craig C. Freeman +
Douglas ex Lindley +
glandular-pubescent +
alternate +, subopposite +, whorled +  and opposite +
glaucescent +
alternate +, opposite +, whorled +, helical +  and subopposite +
cauline +, proximal +  and basal +
rarely +, not glaucous +, glabrate +, pubescent +, hairy +, glandular-lanate +, glandular-pubescent +, puberulent +, glandular +  and glabrous +
not +  and leathery +
tapered;tapered +
lanceolate;spatulate;obovate or elliptic +
not +  and leathery +
3.2mm;7.5mm +
ovate;obovate ovate-oblong or lanceolate +
0.9mm;2.6mm +
short-tubular +  and short-campanulate +
0.4 cm4 mm <br />0.004 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
petiolate +  and sessile +
Taper-leaf beardtongue +
personate +, not personate +, bilabiate +  and symmetric +
light blue +  and violet bluish purple or pinkish blue rarely light yellow or whitish +
white-lanate +  and glandular-pubescent +
tubular-funnelform +
ampliate +
0.7 cm7 mm <br />0.007 m <br /> (2 cm20 mm <br />0.02 m <br />) +
2-8-flowered +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
scale-like +  and not needlelike +
Idaho +, Mont. +, Oreg. +, Wash. +  and Wyo. +
drupe-like +
curved +  and straight +
1 +  and 4 +
0 cm0 mm <br />0 m <br /> (0.12 cm1.2 mm <br />0.0012 m <br />) +
membranous +
terminal +  and axillary +
persistent +  and deciduous +
basal +  and cauline +
puberulent +  and glabrous +
not leathery +
orbiculate;linear;orbiculate;linear;truncate;oblanceolate;obovate;oblong;elliptic;round;lanceolate;ovate +
dentate +, serrate +  and entire +
glutinous +
glandular-ciliolate +, hairy +, puberulent +, glabrescent +, glabrous +  and glandular-pubescent +
lacerate +  and denticulate +
axile +  and parietal +
basal +, apical +  and superior +
tenuinucellate +, unitegmic +  and hemitropous +
campylotropous +, hemianatropous +  and anatropous +
glandular-pubescent +
glandular-pubescent +
5 +  and 4 +
navicular-sigmoid +
indehiscent +  and dehiscing +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.12 cm1.2 mm <br />0.0012 m <br />) +
navicular +  and slightly saccate +
long-petiolate +
9 cm90 mm <br />0.09 m <br /> (13 cm130 mm <br />0.13 m <br />) +
2.5 cm25 mm <br />0.025 m <br /> (3.8 cm38 mm <br />0.038 m <br />) +
5.5 cm55 mm <br />0.055 m <br /> (8 cm80 mm <br />0.08 m <br />) +
1.5 cm15 mm <br />0.015 m <br /> (2.8 cm28 mm <br />0.028 m <br />) +
1.5 cm15 mm <br />0.015 m <br /> (5.5 cm55 mm <br />0.055 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
1.5 cm15 mm <br />0.015 m <br /> (9 cm90 mm <br />0.09 m <br />) +
oblanceolate +
0.2 cm2 mm <br />0.002 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
Edwards’s Bot. Reg. +
minute +
0.2 cm2 mm <br />0.002 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
black +, gray +, brown +  and tan +
angled +  and slightly rounded +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.04 cm0.4 mm <br />4.0e-4 m <br />) +
0.7 cm7 mm <br />0.007 m <br /> (?) +  and 0.9 cm9 mm <br />0.009 m <br /> (?) +
subalternate +, alternate +, whorled +  and opposite +
70 cm700 mm <br />0.7 m <br /> (90 cm900 mm <br />0.9 m <br />) +
glutinous +
climbing +  and scrambling +
sprawling +, creeping +  and prostrate +
ascending;erect +
not glaucous +, hairy +  and glabrous +
5 cm50 mm <br />0.05 m <br /> (70 cm700 mm <br />0.7 m <br />) +
0.8 cm8 mm <br />0.008 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
papillate +  and smooth +
denticulate +
Penstemon attenuatus +
Penstemon sect. Penstemon +
species +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
2-ridged +  and inflated +
not constricted +
cylindric +
3 cm30 mm <br />0.03 m <br /> (27 cm270 mm <br />0.27 m <br />) +
straight +
gibbous +  and not spurred +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
cauline +  and proximal +