Flora of North America species comparison

erect, usually branched from near base and in inflorescence.

ascending or erect, usually unbranched.

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

blade linear or linear-lanceolate, 5–20 × 1–3 mm.

open panicles.

much-branched panicles.

10–25 mm.

spreading, 5–25 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.

heterostylous;

inner sepals ovate-lanceolate or ovate, 4.5–5.5 mm, margins glabrous, apex obtuse, outer ones lanceolate or ovate-lanceolate, 3.5–4.5 mm, narrower than inner ones, margins glabrous, apex acute or acuminate;

petals blue, obovate or obovate-lanceolate, 10–25 mm;

stamens 5 mm, anthers 2 mm (long-styled morph) or stamens 6.5 mm, anthers 1.8 mm (short-styled morph);

styles distinct, 8 mm (long-styled morph) or 2.5 mm (short-styled morph);

stigmas capitate.

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

subglobose, 5–7 mm diam., apex acute to obtuse, segments persistent on plant, margins ciliate or not.

2.5–3 × 1.5–2 mm.

3–4.2 × 1.7–2 mm.

= 30.

= 18.