Flora of North America species comparison

erect, branched at base and in inflorescence.

ascending or erect, usually unbranched.

opposite near base or alternate throughout, appressed-ascending;

stipular glands present;

blade linear to linear-lanceolate, 8–20 × 0.5–2.1 mm, margins entire or with scattered minute marginal glands, not ciliate, apex acute; 1-nerved.

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

panicles, with ascending to spreading branches.

much-branched panicles.

0–3 mm.

spreading, 5–25 mm.

sepals persistent, lanceolate to ovate, 2.5–5 mm, margins of inner sepals narrowly scarious, conspicuously glandular-toothed, apex acute or acuminate;

petals lemon yellow, oblanceolate or narrowly obcordate, 7–11 mm;

stamens 2–8 mm;

anthers 0.5–1 mm;

staminodia present;

styles distinct, 3–6.5 mm;

stigmas capitate.

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.

ovoid, 2–3 × 2–2.5 mm, apex sharp-pointed, dehiscing readily into 10, 1-seeded segments, segments falling freely, false septa incomplete, false and true septa margins ciliate.

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

1.2–1.9 × 0.7–1.1 mm.

3–4.2 × 1.7–2 mm.

= 36.

= 18.