Penstemon rattanii

A. Gray

Proc. Amer. Acad. Arts 15: 50. 1879.

Common names: Rattan’s beardtongue
Endemic
Treatment appears in FNA Volume 17. Treatment on page 219. Mentioned on page 188.

Herbs. Stems ascending to erect, (15–) 30–120 cm, glabrous, sometimes glabrous proximally, glandular-pubescent distally, not glaucous. Leaves basal and cauline, not leathery, glabrous; basal and proximal cauline 30–250 × 7–50 mm, blade elliptic to lanceolate, base tapered, margins serrate to dentate, apex obtuse to acute; cauline 2–5 pairs, short-petiolate or sessile, (10–) 20–75 (–110) × 5–30 (–38) mm, blade oblong to triangular-ovate, base truncate to cordate-clasping distally, margins serrate to dentate, apex obtuse to acute. Thyrses interrupted, cylindric, 2–24 cm, axis glandular-pubescent, verticillasters 2–7, cymes 3–11-flowered, 2 per node; proximal bracts triangular to lanceolate, 6–50 × 1–22 mm, margins entire or ± serrate; peduncles and pedicels ascending to erect, glandular-pubescent. Flowers: calyx lobes ovate to ovate-oblong or lanceolate, 4–10 × (1–) 1.5–2.5 mm, glandular-pubescent; corolla lavender to purple or violet, with reddish purple nectar guides, ventricose to ventricose-ampliate, 20–30 mm, glandular-pubescent externally, sparsely to densely white-lanate internally, tube 6–7 mm, throat abruptly inflated, 8–10 mm diam., 2-ridged abaxially; stamens included, pollen-sacs opposite, subexplanate, 1.2–1.5 mm, dehiscing completely, connective splitting, sides glabrous, sutures smooth or papillate; staminode 21–26 mm, exserted, 0.3–0.4 mm diam., tip straight to recurved, distal 6–10 mm sparsely to moderately lanate, hairs white or yellow, to 3 mm; style 16–19 mm. Capsules 5–9 × 3.5–5 mm, glabrous. 2n = 16.

Discussion

Varieties 2 (2 in the flora).

Penstemon rattanii comprises two morphologically distinct and geographically allopatric varieties confined to the Coast Range of California and Oregon.

Selected References

None.

Key

1 Calyx lobes usually longer than capsules, lanceolate, sometimes ovate, (5.5–)6.5–10 mm, apices acute to acuminate, sometimes obtuse; nw California, sw Oregon. Penstemon rattanii var. rattanii
1 Calyx lobes usually shorter than capsules, ovate-oblong, 4–7 mm, apices obtuse to acute; wc California. Penstemon rattanii var. kleei

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

... more about "Penstemon rattanii"
obtuse +  and acute +
Craig C. Freeman +
A. Gray +
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 +
truncate;cordate-clasping +
tapered +
oblong;triangular-ovate +
not +  and leathery +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
glandular-pubescent +
ovate;ovate-oblong or lanceolate +
1.5mm;2.5mm +
short-tubular +  and short-campanulate +
0.5 cm5 mm <br />0.005 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
sessile +  and short-petiolate +
7.5 cm75 mm <br />0.075 m <br /> (11 cm110 mm <br />0.11 m <br />) +
3 cm30 mm <br />0.03 m <br /> (3.8 cm38 mm <br />0.038 m <br />) +
2 cm20 mm <br />0.02 m <br /> (7.5 cm75 mm <br />0.075 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (3 cm30 mm <br />0.03 m <br />) +
petiolate +  and sessile +
Rattan’s beardtongue +
personate +, not personate +, bilabiate +  and symmetric +
lavender +  and purple or violet +
white-lanate +  and glandular-pubescent +
ventricose +
ventricose-ampliate +
2 cm20 mm <br />0.02 m <br /> (3 cm30 mm <br />0.03 m <br />) +
3-11-flowered +
0.6 cm6 mm <br />0.006 m <br /> (1 cm10 mm <br />0.01 m <br />) +
scale-like +  and not needlelike +
Calif. +  and Oreg. +
drupe-like +
curved +  and straight +
1 +  and 4 +
yellow +  and white +
0 cm0 mm <br />0 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
membranous +
terminal +  and axillary +
persistent +  and deciduous +
basal +  and cauline +
not leathery +
orbiculate;linear;orbiculate;linear;truncate;oblanceolate;obovate;oblong;elliptic;round;lanceolate;ovate +
serrate +  and entire +
glutinous +
glandular-ciliolate +, hairy +, puberulent +, glabrescent +, glabrous +  and glandular-pubescent +
lacerate +, toothed +  and entire +
axile +  and parietal +
basal +, apical +  and superior +
tenuinucellate +, unitegmic +  and hemitropous +
campylotropous +, hemianatropous +  and anatropous +
ascending +  and erect +
glandular-pubescent +
ascending;erect +
glandular-pubescent +
5 +  and 4 +
navicular-sigmoid +
0.12 cm1.2 mm <br />0.0012 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
1/5 +  and 2/3 +
0.6 cm6 mm <br />0.006 m <br /> (5 cm50 mm <br />0.05 m <br />) +
triangular +  and lanceolate +
0.1 cm1 mm <br />0.001 m <br /> (2.2 cm22 mm <br />0.022 m <br />) +
Proc. Amer. Acad. Arts +
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 />) +
2.1 cm21 mm <br />0.021 m <br /> (?) +  and 2.6 cm26 mm <br />0.026 m <br /> (?) +
subalternate +, alternate +, whorled +  and opposite +
15 cm150 mm <br />0.15 m <br /> (30 cm300 mm <br />0.3 m <br />) +
glutinous +
climbing +  and scrambling +
sprawling +, creeping +  and prostrate +
ascending;erect +
not glaucous +, glandular-pubescent +  and glabrous +
30 cm300 mm <br />0.3 m <br /> (120 cm1,200 mm <br />1.2 m <br />) +
1.6 cm16 mm <br />0.016 m <br /> (1.9 cm19 mm <br />0.019 m <br />) +
papillate +  and smooth +
denticulate +
Penstemon rattanii +
Penstemon sect. Penstemon +
species +
0.8 cm8 mm <br />0.008 m <br /> (1 cm10 mm <br />0.01 m <br />) +
2-ridged +  and inflated +
not constricted +
cylindric +
2 cm20 mm <br />0.02 m <br /> (24 cm240 mm <br />0.24 m <br />) +
straight +
gibbous +  and not spurred +
0.6 cm6 mm <br />0.006 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
cauline +  and proximal +