Penstemon calcareus
Zoë 5: 152. 1903. (as Pentstemon)
Stems ascending to erect, 5–35 cm, puberulent. Leaves basal and cauline, ± leathery, ± retrorsely hairy, sometimes glabrate abaxially; basal and proximal cauline petiolate, 15–55 × 6–25 mm, blade elliptic to broadly ovate, base tapered, rarely truncate, margins entire or remotely and obscurely serrate, apex obtuse to acute; cauline 2 or 3 pairs, sessile, 25–75 × 10–21 mm, blade lanceolate to oblanceolate, rarely ovate, base truncate to subcordate-clasping, margins entire or obscurely dentate, apex obtuse to acute. Thyrses continuous or interrupted, cylindric, 6–18 cm, axis glandular-pubescent, verticillasters 2–8, cymes (1–)3–7-flowered, 2 per node; proximal bracts lanceolate to ovate, 13–38 × 9–20 mm; peduncles and pedicels glandular-pubescent. Flowers: calyx lobes lanceolate, 5–7.5 × 0.9–1.8 mm, glandular-pubescent; corolla pink to rose red or rose purple, with reddish nectar guides, tubular-funnelform, 12–17 mm, sparsely white-lanate internally abaxially, tube 4–5 mm, throat gradually inflated, not constricted at orifice, 2.5–4 mm diam., slightly 2-ridged abaxially; stamens included, pollen sacs opposite, subexplanate to explanate, 0.6–0.7 mm, dehiscing completely, sutures smooth; staminode 7–9 mm, included, 0.2–0.3 mm diam., tip straight to recurved, distal 5–6 mm densely pilose, hairs golden yellow, to 0.8 mm; style 4–6 mm. Capsules 6–9 × 4–5.5 mm.
Phenology: Flowering Apr–May.
Habitat: Limestone crevices, rocky slopes, pine-juniper woodlands.
Elevation: 1200–2000 m.
Discussion
Penstemon calcareus is known from Inyo and San Bernardino counties, California, and Esmeralda County, Nevada. The later homonym, P. calcareus M. E. Jones, is referable to P. petiolatus.
Selected References
None.