Flora of North America species comparison

erect, unbranched or few-branched at base (all flowering).

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

divergent;

blade linear to linear-lanceolate, 10–40 × 1.5–5 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.

erect in fruit, to 20–25 mm.

1–4 mm.

homostylous;

sepals ovate, 6–9 mm, margins of inner sepals minutely ciliate, outer ciliate, apex acuminate;

petals usually blue, rarely white, obovate, 10–15 mm;

stamens 5–7 mm;

anthers 1–1.5 mm;

staminodia present;

styles distinct or connate at base, 3–6 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.

ovoid to subglobose, 6–10 × 5–10 mm, apex rounded, dehiscing incompletely, segments falling freely, margins ciliate or not.

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.

4–6 × 2.5–3 mm.

2–2.5 × 1.1–1.3 mm.

= 30.

= 26.