Penstemon deustus var. variabilis

(Suksdorf) Cronquist

in C. L. Hitchcock et al., Vasc. Pl. Pacif. N.W. 4: 380. 1959.

EndemicConservation concern
Basionym: Penstemon variabilis Suksdorf Deutsche Bot. Monatsschr. 18: 153. 1900
Synonyms: P. deustus subsp. variabilis (Suksdorf) Pennell & D. D. Keck
Treatment appears in FNA Volume 17. Treatment on page 202. Mentioned on page 200.

Leaves whorled, sometimes opposite or subopposite, cauline 11–48 × (0.5–)1–5 mm, blade oblanceolate or lanceolate to linear, margins serrate to serrulate distally or entire. Flowers: calyx lobes ovate to lanceolate, 2.8–4.5 × 0.8–1.6 mm, apex acute to acuminate; corolla 10–12(–15) mm, glandular-pubescent externally, glandular-pubescent internally, abaxial lobes white to ochroleucous, sometimes tinged lavender; staminode: distal 0.5 mm sparsely villous, hairs white, to 0.5 mm. 2n = 32.


Phenology: Flowering Jun–Jul.
Habitat: Gravelly slopes, streambeds.
Elevation: 600–2600 m.

Discussion

Variety variabilis occurs from southern Washington to central and eastern Oregon. Populations are most concentrated in the Blue Mountains.

Selected References

None.

Lower Taxa

None.
Craig C. Freeman +
(Suksdorf) Cronquist +
Penstemon variabilis +
Oreg. +  and Wash. +
600–2600 m. +
Gravelly slopes, streambeds. +
Flowering Jun–Jul. +
in C. L. Hitchcock et al., Vasc. Pl. Pacif. N.W. +
Endemic +  and Conservation concern +
P. deustus subsp. variabilis +
Penstemon deustus var. variabilis +
Penstemon deustus +
variety +