Penstemon navajoa
Brittonia 30: 419, fig. 3. 1978.
Stems ascending to erect, 15–65 cm, glabrous, not glaucous. Leaves basal and cauline, not leathery, glabrous or retrorsely hairy, not glaucous; basal and proximal cauline 12–80 × 4–10(–15) mm, blade spatulate to oblanceolate or lanceolate, base tapered, margins entire, apex rounded to obtuse, or acute; cauline 3 or 4 pairs, sessile, 12–50(–75) × 1–5 mm, blade oblanceolate to linear, base tapered, apex acute to acuminate. Thyrses interrupted, secund, 2–25(–47) cm, axis glabrous, verticillasters 4–14, cymes 1- or 2(or 3)-flowered, 1 or 2 per node; proximal bracts linear, 6–15(–68) × 1–2 mm; peduncles and pedicels glabrous. Flowers: calyx lobes ovate, 2.6–4 × 1.5–2.2 mm, glabrous; corolla blue to lavender, with faint reddish purple nectar guides, ventricose, 18–23(–25) mm, glabrous externally, sparsely white-villous internally abaxially, tube 7–9 mm, throat gradually to abruptly inflated, not constricted at orifice, 7–10 mm diam., slightly 2-ridged abaxially; stamens reaching orifice or longer pair slightly exserted, pollen sacs opposite, navicular, 1.2–1.8 mm, dehiscing incompletely, proximal 1/5 sometimes indehiscent, connective not splitting, sides lanate, rarely glabrous, hairs white, to 0.9 mm, sutures denticulate, teeth to 0.1 mm; staminode 9–11 mm, reaching orifice, 0.5–0.7 mm diam., tip straight, glabrous; style 12–17 mm. Capsules 6.9–13 × 4.5–6.5 mm.
Phenology: Flowering Jul–Aug.
Habitat: Rocky ponderosa pine, aspen, Douglas fir, and subalpine fir forests.
Elevation: 2500–3200 m.
Discussion
Penstemon navajoa is known from the Abajo Mountains, upper Dark Canyon, and Navajo Mountain in San Juan County.
Selected References
None.