Penstemon triphyllus

Douglas

Edwards’s Bot. Reg. 15: plate 1245. 1829.

Common names: Whorled beardtongue
Endemic
Treatment appears in FNA Volume 17. Treatment on page 244. Mentioned on page 229, 230, 245.

Subshrubs. Stems ascending to erect, 25–80 cm, retrorsely hairy, hairs pointed, not glaucous. Leaves cauline, whorled, sometimes alternate, glabrate or retrorsely hairy, hairs pointed, not glaucous; cauline 15–20 pairs, sessile, (5–) 10–52 × 1–6 (–12) mm, blade linear, sometimes lanceolate, base tapered, margins coarsely serrate-dentate, distals sometimes entire, apex acute. Thyrses interrupted, cylindric, 4–35 cm, axis glandular-pubescent, verticillasters 5–10, cymes 1–4-flowered, 1 or 2 (or 3) per node; proximal bracts linear, rarely lanceolate, 5–34 × 1–6 mm; peduncles and pedicels spreading to ascending, peduncles retrorsely hairy and, sometimes, glandular-pubescent distally, pedicels glandular-pubescent. Flowers: calyx lobes lanceolate, 3.5–5.8 × 1–2 mm, glandular-pubescent; corolla bluish lavender to lavender, pinkish, pale-purple, or violet, with reddish purple nectar guides, funnelform, 13–19 mm, glandular-pubescent externally, glabrous internally or sparsely white-lanate abaxially, tube 5–7 mm, throat gradually inflated, 5–6 mm diam., rounded abaxially; stamens included, filaments glabrous or white-pubescent distally, pollen-sacs parallel, 0.9–1.3 mm, distal 2/3 indehiscent, sides glabrous, sutures denticulate, teeth to 0.1 mm; staminode 9–11 mm, exserted, 0.2–0.3 mm diam., distal 6–7 mm moderately to densely lanate, hairs yellow, to 2.5 mm; style 8–10 mm. Capsules 4.5–7 × 3–4.5 mm. 2n = 16.


Phenology: Flowering May–Jul.
Habitat: Cliffs, rocky slopes, basalt.
Elevation: 300–1800 m.

Discussion

Penstemon triphyllus occurs near the Snake River in northeastern Oregon (Baker and Wallowa counties), southeastern Washington (Asotin, Franklin, Garfield, Klickitat, Okanogan, and Whitman counties), and adjacent Idaho (Adams, Idaho, Lemhi, Lewis, Nez Perce, and Valley counties), extending up the Salmon River.

Selected References

None.

Lower Taxa

None.

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

... more about "Penstemon triphyllus"
Craig C. Freeman +
Douglas +
glandular-pubescent +
subalternate +, whorled +, alternate +  and opposite +
alternate +, opposite +, whorled +, helical +  and subopposite +
cauline +, proximal +  and basal +
not +, glaucous +, glandular-pubescent +, hirsute +, pilose +, canescent +, hairy +, puberulent +, glabrate +  and glabrous +
tapered +
lanceolate +
not +  and leathery +
3.5mm;5.8mm +
glandular-pubescent +
short-tubular +  and short-campanulate +
0.45 cm4.5 mm <br />0.0045 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (1 cm10 mm <br />0.01 m <br />) +
0.6 cm6 mm <br />0.006 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
1 cm10 mm <br />0.01 m <br /> (5.2 cm52 mm <br />0.052 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
Whorled beardtongue +
not personate +  and bilabiate +
violet +, pale-purple +, pinkish +  and bluish lavender to lavender +
white-lanate +, or +, glabrous +  and glandular-pubescent +
ventricose +
ventricose-ampliate +  and ampliate +
1.3 cm13 mm <br />0.013 m <br /> (1.9 cm19 mm <br />0.019 m <br />) +
1-4-flowered +
2 +  and 1 +
0.6 cm6 mm <br />0.006 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
scale-like +  and not needlelike +
Idaho +, Oreg. +  and Wash. +
drupe-like +
300–1800 m. +
curved +  and straight +
white-pubescent +  and glabrous +
1 +  and 4 +
Cliffs, rocky slopes, basalt. +
not glaucous +
pointed +
0 cm0 mm <br />0 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
membranous +
terminal +  and axillary +
alternate +  and whorled +
persistent +  and deciduous +
hairy +  and glabrate +
orbiculate;linear;orbiculate;linear;truncate;oblanceolate;obovate;oblong;elliptic;round;lanceolate;ovate +
erose +  and entire +
ciliolate +, pubescent +, puberulent +, scabrous +, glandular-pubescent +  and glabrous +
lacerate +, laciniate-pinnatifid +, toothed +  and entire +
axile +  and parietal +
basal +, apical +  and superior +
tenuinucellate +, unitegmic +  and hemitropous +
campylotropous +, hemianatropous +  and anatropous +
spreading +  and ascending +
glandular-pubescent +
spreading;ascending +
glandular-pubescent +  and hairy +
5 +  and 4 +
Flowering May–Jul. +
navicular-sigmoid +
0.09 cm0.9 mm <br />9.0e-4 m <br /> (0.13 cm1.3 mm <br />0.0013 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (3.4 cm34 mm <br />0.034 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
Edwards’s Bot. Reg. +
minute +
brown +, gray +  and tan +
patelliform +  and angled +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.34 cm3.4 mm <br />0.0034 m <br />) +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.03 cm0.3 mm <br />3.0e-4 m <br />) +
0.9 cm9 mm <br />0.009 m <br /> (?) +  and 1.1 cm11 mm <br />0.011 m <br /> (?) +
subalternate +, alternate +, whorled +  and opposite +
climbing +  and scrambling +
sprawling +, creeping +  and prostrate +
ascending;erect +
25 cm250 mm <br />0.25 m <br /> (80 cm800 mm <br />0.8 m <br />) +
0.8 cm8 mm <br />0.008 m <br /> (1 cm10 mm <br />0.01 m <br />) +
papillate +
denticulate +
Penstemon subg. Saccanthera +
Penstemon triphyllus +
Penstemon sect. Saccanthera +
species +
0.5 cm5 mm <br />0.005 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
rounded +  and inflated +
not constricted +
cylindric +
4 cm40 mm <br />0.04 m <br /> (35 cm350 mm <br />0.35 m <br />) +
straight +
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 /> (0.7 cm7 mm <br />0.007 m <br />) +