Bot. Gaz. 27: 454. 1899.
Herbs. Stems ascending or erect, 50–120 cm, glaucous. Leaves: basal and proximal cauline 45–80 (–100) × 15–30 (–40) mm, blade obovate to ovate, oblanceolate, or lanceolate, base tapered, margins coarsely dentate, apex obtuse to acute; cauline 6–9 pairs, sessile or proximals short-petiolate, 50–100 × (8–) 20–45 mm, blade ovate to lanceolate, base cordate-clasping or tapered, margins coarsely dentate, apex acute, sometimes obtuse. Thyrses interrupted, secund, 30–80 cm, axis glabrous or sparsely glandular-pubescent distally, verticillasters 9–19, cymes 1–5-flowered; proximal bracts lanceolate, 10–55 × 2–30 mm; peduncles and pedicels ascending to erect, glandular-pubescent. Flowers: calyx lobes ovate, 4.2–6 × 2–3 mm, glandular-pubescent; corolla lavender to light pink, rose-pink, or light yellow, with reddish nectar guides, strongly bilabiate, ventricose, 21–32 mm, glandular-pubescent externally, glandular-pubescent internally, tube 6–12 mm, length 2–2.2 times calyx lobes, throat gradually to abruptly inflated, constricted or slightly so at orifice, 6–16 mm diam., rounded abaxially; stamens included, filaments glabrous, pollen-sacs explanate, 1.4–1.8 mm, sutures smooth; staminode 16–19 mm, included, 0.7–0.9 mm diam., tip straight, glabrous; style 15–20 mm, glabrous. Capsules 8–13 × 4–7 mm, glabrous. 2n = 16.
Varieties 2 (2 in the flora).
The two varieties of Penstemon floridus are sympatric in the southern Silver Peak Range and southern White Mountains, where they apparently hybridize and introgress (N. H. Holmgren 1984).
"/4+timescorollathroat" is not declared as a valid unit of measurement for this property."-2.2timescalyxlobes" is not declared as a valid unit of measurement for this property.