Flora of North America species comparison

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

ascending to erect, 9–35 cm, glabrous, often glutinous and covered with sand, not glaucous.

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.

basal and cauline, ± leathery or not, glabrous, often glutinous and covered with sand, not glaucous;

basal and proximal cauline 18–105 × 1–10 mm, blade oblanceolate to linear, base tapered, margins entire, apex obtuse to acute;

cauline (2 or)3 or 4 pairs, petiolate or sessile, 28–110 × 1–6 mm, blade linear, base tapered to truncate, 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.

continuous, secund, 3–26 cm, axis glabrous, sometimes glutinous and covered with sand, verticillasters 3–6(–9), cymes 1–3-flowered, 2 per node;

proximal bracts linear, 22–115 × 1.5–4 mm;

peduncles and pedicels glabrous, sometimes glutinous and covered with sand.

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, (6–)7–12 × 2.8–4 mm, glabrous, glutinous and sometimes covered with sand;

corolla blue to violet or purple, with violet nectar guides, ventricose, 20–28 mm, glabrous externally, glabrous internally, tube 8–9 mm, throat abruptly inflated, slightly constricted at orifice, (7–)10–12 mm diam., slightly 2-ridged abaxially;

stamens: longer pair reaching orifice, pollen sacs divergent, navicular-sigmoid, 2–2.5 mm, dehiscing incompletely, proximal 1/5 indehiscent, connective not splitting, sides moderately villous or lanate, hairs white, to 1 mm, sutures denticulate, teeth to 0.1 mm;

staminode: 11–18 mm, reaching orifice or slightly exserted, 0.6–0.8 mm diam., tip straight, distal 1–2 mm sparsely to moderately pilose, hairs yellow, to 1 mm;

style 17–20 mm.

5–9 × 3–5.3 mm, glabrous.

(5–)7–11 × (4–)5–8 mm.

= 16.