Flora of North America species comparison

20–90 cm, retrorsely hairy, sometimes glabrescent.

erect, (30–)40–70 cm, glabrous.

glabrous or retrorsely hairy;

basal and proximal cauline 16–80 × 3–10 mm, blade oblanceolate to lanceolate, base tapered, margins entire, apex obtuse to acute;

cauline 6–15(–20) pairs, 45–150 × 1–6 mm, blade linear, base tapered, apex acute to acuminate.

basal and cauline, glabrous;

basal and proximal cauline (15–)30–70 × (6–)13–26 mm, blade trullate to ovate or elliptic, base tapered, apex acute, obtuse, rounded, or mucronate;

cauline 3–7 pairs, sessile, (10–)18–53 × (7–)12–26 mm, blade ovate to elliptic or oblanceolate, base tapered to clasping, apex obtuse to acute, rounded, or mucronate.

cylindric to ± secund, 10–35 cm, axis glabrous, verticillasters (2–)5–8, cymes (1 or)2–4(or 5)-flowered;

proximal bracts linear, 8–30(–80) × 0.5–2 mm;

peduncles and pedicels glabrous or pedicels rarely glandular-pubescent.

interrupted, cylindric, 13–30 cm, axis glabrous, verticillasters 6–10, cymes 1–4(–7)-flowered;

proximal bracts ovate to lanceolate, 10–20 × 3–12 mm;

peduncles and pedicels glabrous.

calyx lobes elliptic to ovate, 4.2–7(–8.5) × 2–2.6(–3.5) mm, glabrous, rarely glandular-pubescent;

corolla violet to blue, lavender, or purple, lined internally abaxially with reddish purple nectar guides, ventricose, 23–37 mm, glabrous internally, tube 7–10 mm, throat abruptly inflated, 9–10 mm diam., slightly 2-ridged abaxially;

stamens included, pollen sacs parallel to divergent, 1.6–1.8 mm, sutures denticulate, teeth to 0.2 mm;

staminode 20–23 mm, exserted, 1.8–2.6 mm diam.;

style 20–24 mm.

calyx lobes ovate to lanceolate, 3.5–7(–9) × 2–2.7 mm, margins entire or erose, broadly scarious, glabrous;

corolla blue to violet, lavender, or pinkish blue, without nectar guides, funnelform, 17–24 mm, glabrous externally, glabrous internally, tube 8–11 mm, throat gradually inflated, 5–7 mm diam., rounded abaxially;

stamens: 2 prominently exserted, 4–6 mm, 2 included, pollen sacs parallel or divergent, 2–3 mm, sutures smooth;

staminode 7–10 mm, included or reaching orifice, 0.5–1(–1.5) mm diam., tip recurved, distal 4–6 mm densely villous, hairs golden yellow, to 1.5 mm;

style 18–22 mm.

9–15 × 6–9 mm.

7–11 × 4–6 mm.