Flora of North America species comparison

erect, usually branched from near base and in inflorescence.

erect or shortly decumbent at base, becoming erect, branched from near base.

blade linear to linear-lanceolate, 5–25 × 1–1.5 mm.

usually only proximalmost opposite, sometimes to midstem, distal alternate, erect to ± spreading;

stipular glands absent;

blade of proximal leaves narrowly to broadly elliptic-oblanceolate, 10–15 × 1.5–2.5 mm, margins entire, not ciliate, apex subacute to acuminate; 1-nerved.

open panicles.

slender thyrses.

10–25 mm.

1–4 mm.

homostylous;

sepals ovate, 4–5.5 mm, margins of inner sepals minutely ciliate, outer glabrous, apex acute to acuminate;

petals blue, obovate, 6–10 mm;

stamens 4–5 mm;

anthers 1–2.5 mm;

staminodia present or absent;

styles distinct, 2 mm;

stigmas linear or clavate.

sepals persistent, linear-lanceolate to lanceolate, 3–5.3 mm, margins not scarious, inner ones conspicuously glandular-toothed, outer entire or very sparsely glandular-toothed, apex acute to acuminate;

petals yellow, oblanceolate, 4–7 mm;

stamens 3–5 mm;

anthers 1–1.5 mm;

staminodia absent;

styles distinct, 1.5–3 mm;

stigmas capitate.

broadly ovate to subglobose, 4–6 × 4–6 mm, apex very sharp-pointed, segments ± persistent on plant, margins ciliate.

triangular-ovoid to broadly ovoid, 2.5–3.5 × 2.7–3.5 mm, apex obtuse, somewhat tardily dehiscing into 10, 1-seeded segments, segments persistent on plant, false septa incomplete, proximal margins ciliate.

2.5–3 × 1.5–2 mm.

2–2.5 × 1.1–1.3 mm.

= 30.

= 26.