Flora of North America species comparison

erect, usually branched from near base and in inflorescence.

erect, unbranched proximal to inflorescence.

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

mostly opposite, appressed-erect;

stipular glands absent;

blade elliptic to oblanceolate, cauline leaves 13–17 × 3–4 mm, margins entire, apex obtuse to acute.

open panicles.

of few, few-flowered panicles, branches spreading-ascending, occupying to 1/4 or less of total height.

10–25 mm.

0.5–2.9 mm, stout.

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, inner ones broadly obovate, outer ovate, 3.1–3.6 mm, margins not scarious, inner glandular-toothed, outer entire, apex acute to acuminate;

petals pale to bright yellow, ovate, 6–7 mm;

stamen length unknown;

anther length unknown;

staminodia absent;

styles distinct, 2–3.1 mm;

stigmas capitate.

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

subglobose, 2.6–3 × 2.8–3 mm, apex abruptly short-pointed, dehiscing into 10, 1-seeded segments, segments falling freely, false septa nearly complete, ± spongy, proximal margins not ciliate.

2.5–3 × 1.5–2 mm.

not seen.

= 30.

= 36.