Penstemon davidsonii var. davidsonii

Endemic
Treatment appears in FNA Volume 17. Treatment on page 87. Mentioned on page 88, 92.

Leaf-blades spatulate to orbiculate, margins entire, sometimes serrulate, apex rounded to obtuse. Flowers: corolla lavender or bluish lavender, violet, or purple, 20–36 mm, moderately white-villous internally abaxially. 2n = 16.


Phenology: Flowering May.
Habitat: Rock outcrops, talus slopes.
Elevation: 900–3700 m.

Distribution

B.C., Calif., Nev., Oreg., Wash.

Discussion

The ranges of var. davidsonii and var. menziesii overlap throughout much of British Columbia and Washington. Variety davidsonii hybridizes with var. menziesii, and with Penstemon cardwellii, P. fruticosus, P. newberryi, and P. rupicola.

Selected References

None.

Lower Taxa

None.

"/3-3/4timescorollathroat" is not declared as a valid unit of measurement for this property.

white +  and lavender +
white-villous +  and glabrous +
2 cm20 mm <br />0.02 m <br /> (4.5 cm45 mm <br />0.045 m <br />) +
not glaucous +, puberulent +  and glabrous +
Rounded (?) +  and Obtuse (?) +
Craig C. Freeman +
Greene +
glandular-pubescent +  and hairy +
alternate +, opposite +, whorled +, helical +  and subopposite +
tapered +
Dasanthera +
elliptic;orbiculate ovate or spatulate +
not +  and leathery +
1.2 cm12 mm <br />0.012 m <br /> (1.4 cm14 mm <br />0.014 m <br />) +
0.7 cm7 mm <br />0.007 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
glandular-pubescent +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.43 cm4.3 mm <br />0.0043 m <br />) +
short-tubular +  and short-campanulate +
0.8 cm8 mm <br />0.008 m <br /> (1.3 cm13 mm <br />0.013 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
sessile +, short-petiolate +  and petiolate +
not +, personate +  and bilabiate +
purple +, violet +  and bluish lavender +
white-villous +
ventricose-ampliate +  and ampliate +
2 cm20 mm <br />0.02 m <br /> (3.6 cm36 mm <br />0.036 m <br />) +
sessile +  and short-petiolate +
2 cm20 mm <br />0.02 m <br /> (3 cm30 mm <br />0.03 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
scale-like +  and not needlelike +
1 cm10 mm <br />0.01 m <br /> (2 cm20 mm <br />0.02 m <br />) +
usually distinctly smaller +
0.4 cm4 mm <br />0.004 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
B.C. +, Calif. +, Nev. +, Oreg. +  and Wash. +
drupe-like +
900–3700 m. +
curved +  and straight +
1 +  and 4 +
Rock outcrops, talus slopes. +
0 cm0 mm <br />0 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
membranous +
terminal +  and axillary +
subopposite +  and opposite +
persistent +
not +, glaucous +, hairy +  and glabrous +
5 (?) +  and 10 (?) +
leathery +
orbiculate;linear;orbiculate;linear;truncate;oblanceolate;obovate;oblong;elliptic;round;lanceolate;ovate +
erose +  and entire +
serrulate +  and entire +
glandular +, glabrous +  and glandular-pubescent +
toothed +  and entire +
axile +  and parietal +
basal +, apical +  and superior +
tenuinucellate +, unitegmic +  and hemitropous +
campylotropous +, hemianatropous +  and anatropous +
ascending +  and erect +
puberulent +  and glandular-pubescent +
puberulent +  and glandular-pubescent +
5 +  and 4 +
Flowering May. +
0.09 cm0.9 mm <br />9.0e-4 m <br /> (0.16 cm1.6 mm <br />0.0016 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
round +  and ovate or lanceolate +
0.1 cm1 mm <br />0.001 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
minute +
0.01 cm0.1 mm <br />1.0e-4 m <br /> (0.02 cm0.2 mm <br />2.0e-4 m <br />) +
0.7 cm7 mm <br />0.007 m <br /> (?) +  and 1.4 cm14 mm <br />0.014 m <br /> (?) +
subalternate +, alternate +, whorled +  and opposite +
climbing +  and scrambling +
sprawling +, creeping +  and prostrate +
ascending;erect +
4 cm40 mm <br />0.04 m <br /> (10 cm100 mm <br />0.1 m <br />) +
1.9 cm19 mm <br />0.019 m <br /> (2.6 cm26 mm <br />0.026 m <br />) +
Penstemon menziesii subsp. davidsonii +
Penstemon davidsonii var. davidsonii +
Penstemon davidsonii +
variety +
0.7 cm7 mm <br />0.007 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
2-ridged +  and inflated +
not constricted +
secund +  and continuous +
conic +  and cylindric +
1 cm10 mm <br />0.01 m <br /> (6 cm60 mm <br />0.06 m <br />) +
straight +
0.4 cm4 mm <br />0.004 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
gibbous +  and not spurred +
0.6 cm6 mm <br />0.006 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
subshrub +  and cespitose +