Flora of North America species comparison

ascending to erect, 6–40 cm, retrorsely hairy, not glaucous.

prostrate to ascending, to 1 cm (to 15 cm diam.), scabrous or puberulent.

basal and cauline, alternate or mostly opposite, not leathery, retrorsely hairy;

basal and proximal cauline 10–50(–70) × 1–4 mm, blade spatulate to oblanceolate or linear, base tapered, margins entire, revolute, apex rounded to obtuse or acute;

cauline 8–12 pairs (or 13–25 leaves when alternate), sessile, 7–35 × 1–3 mm, blade oblanceolate to linear, base tapered, margins entire, apex acute.

essentially basal, not leathery, scabrous;

basal and proximal cauline sessile, 6–15(–22) × 0.6–1.3(–1.5) mm, blade linear, base tapered, margins entire, apex acute.

interrupted, cylindric to secund, 2–12 cm, axis glandular-pubescent and retrorsely hairy, verticillasters 3–12, cymes 1(or 2)-flowered, 1 or 2 per node;

proximal bracts lanceolate to linear, 5–18 × 0.5–3 mm, margins entire;

peduncles and pedicels erect, glandular-pubescent and/or retrorsely hairy.

essentially absent, verticillasters 1, cymes 1(or 2)-flowered, 1 per node;

proximal bracts linear, 5–10 × 0.6–1 mm;

peduncles and pedicels glandular-pubescent and scabrous.

calyx lobes lanceolate, 5–8.5 × 1.7–2.7 mm, puberulent and glandular-pubescent;

corolla violet to blue or purple, with or without reddish nectar guides, funnelform, 15–22 mm, glandular-pubescent externally, glandular-pubescent internally, tube 3–4 mm, throat gradually inflated, 5–6 mm diam., slightly 2-ridged abaxially;

stamens included or longer pair reaching orifice, pollen sacs opposite, navicular to subexplanate, 0.8–1 mm, dehiscing completely, connective splitting, sides glabrous, sutures smooth;

staminode 8–11 mm, included, 0.4–0.6 mm diam., tip straight, distal 3–5 mm sparsely to densely pubescent, hairs yellow, to 1 mm;

style 10–12 mm.

calyx lobes lanceolate, 3.5–5.5 × 0.8–1.5 mm, glandular-pubescent and scabrous;

corolla lavender to blue or violet, without nectar guides, funnelform, 11–15 mm, yellowish or white-villous internally abaxially, tube 5–6 mm, throat gradually inflated, not constricted at orifice, 4.5–6 mm diam., slightly 2-ridged abaxially;

stamens: longer pair reaching orifice or exserted, pollen sacs widely divergent or opposite, navicular, 0.7–0.9 mm, dehiscing completely, sutures papillate;

staminode 7–9 mm, exserted, 0.4–0.5 mm diam., tip straight to slightly recurved, distal 4–7 mm densely pilose, hairs orange, to 0.8 mm;

style 7–8 mm.

5–9 × 3–5.3 mm, glabrous.

2.5–3.5 × 2.5–3 mm.

= 16.