Flora of North America species comparison

decumbent to ascending or erect, (5–)10–30(–47) cm, puberulent or retrorsely hairy, hairs pointed, not glaucous.

erect, (30–)40–70 cm, glabrous.

cauline, opposite, glabrous, sometimes proximals puberulent, hairs pointed, not glaucous;

cauline 2–7 pairs, short-petiolate or sessile, 11–48(–60) × 2–12 mm, blade oblanceolate to spatulate or obovate, rarely linear, base tapered, margins entire, apex rounded to obtuse or acute.

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.

continuous or interrupted, cylindric to ± secund, (1–)2–15(–25) cm, axis glabrous or retrorsely hairy, verticillasters 2–8, cymes 1–4-flowered, 2 per node;

proximal bracts lanceolate, 10–35 × 1–4 mm;

peduncles and pedicels ascending to erect, peduncles glabrous or sparsely retrorsely hairy, pedicels glabrous or papillate distally.

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 ovate to lanceolate, 3–5.5 × 0.9–2.2 mm, margins entire or erose, scarious, apex acuminate to caudate, glabrous;

corolla lavender to blue or violet, with or without faint lavender nectar guides, funnelform to ventricose, 14–26 mm, glabrous externally, glabrous internally, tube 5–8 mm, throat gradually inflated, 6–8(–10) mm diam., slightly 2-ridged abaxially;

stamens included or longer pair reaching orifice, filaments glabrous, pollen sacs parallel, 0.9–1.9 mm, distal 1/2–2/3 indehiscent, sides glabrous or puberulent, hairs white, to 0.1 mm, sutures denticulate, teeth to 0.2 mm;

staminode 10–15 mm, included or reaching orifice, 0.6–0.9 mm diam., glabrous;

style 12–18 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.

6–8 × 2.5–4.5 mm.

7–11 × 4–6 mm.