Penstemon clutei

A. Nelson

Amer. Bot. (Binghamton) 33: 109. 1927.

Common names: Sunset Crater beardtongue
EndemicConservation concern
Synonyms: Penstemon pseudospectabilis subsp. clutei (A. Nelson) D. D. Keck
Treatment appears in FNA Volume 17. Treatment on page 249. Mentioned on page 247.

Herbs. Stems ascending to erect, 30–60 cm, glaucous. Leaves: basal and proximal cauline 26–56 × 7–15 mm, blade lanceolate to elliptic, base tapered, margins coarsely dentate or serrate, apex obtuse to acute; cauline 4–7 pairs, short-petiolate or sessile, 30–55 × 5–32 mm, blade ovate to lanceolate, base tapered or auriculate-clasping to connate-perfoliate on distal leaves, margins coarsely dentate, apex acute to acuminate. Thyrses interrupted, secund, 8–30 cm, axis glabrous or sparsely glandular-pubescent distally, verticillasters 3–10, cymes 1–3-flowered; proximal bracts ovate to triangular, 12–35 × 8–32 mm; peduncles and pedicels ascending to erect, glandular-pubescent. Flowers: calyx lobes ovate to elliptic, 3.5–5.5 × 2.5–3.8 mm, glandular-pubescent; corolla pink to rose pink, with reddish purple nectar guides, strongly bilabiate, ventricose, 23–27 mm, glandular-pubescent externally, glandular-pubescent internally, also usually moderately white-lanate abaxially, tube 6–10 mm, length 1.6–2 times calyx lobes, throat abruptly inflated, ± constricted at orifice, 9–12 mm diam., rounded abaxially; stamens: longer pair reaching orifice, filaments of shorter pair glandular-puberulent proximally, pollen sacs explanate, 1.3–1.6 mm, sutures smooth; staminode 16–18 mm, exserted, 0.4–0.6(–1) mm diam., tip straight, glabrous or distal 2–4 mm moderately lanate, hairs yellow, to 1 mm; style 17–22 mm, glabrous. Capsules 9–12 × 6–7 mm, glabrous. 2n = 16.


Phenology: Flowering Apr–Aug.
Habitat: Volcanic cinder fields, pine forests.
Elevation: 1900–2600 m.

Discussion

Penstemon clutei occurs only near Indian Flat and Sunset Crater in south-central Coconino County.

Selected References

None.

Lower Taxa

None.