Flora of North America species comparison

erect, branches 1–several from base, unbranched proximal to inflorescence.

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

proximal 4–10 pairs opposite, distal alternate, erect to spreading;

stipular glands absent;

blade of proximal leaves spatulate, central and distal elliptic, oblanceolate, or obovate, 15–25 × 3–7 mm, margins entire, not ciliate, apex acute to apiculate.

divergent;

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

corymbs.

open panicles.

1–10 mm.

erect in fruit, to 20–25 mm.

sepals persistent, lanceolate-ovate, inner shorter, broader, thinner than outer, outer sepals 2–4 mm, margins not scarious, inner sepals usually with a few small, sessile glands along margin distal to middle, rarely eglandular, outer ones entire, apex acute to acuminate;

petals yellow, obovate (sometimes notched at apex), 3–5.5 mm;

stamens 1.2–3 mm;

anthers 0.5–1 mm;

staminodia absent;

styles distinct, 1–2 mm;

stigmas capitate.

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.

globose, carpels flattened or ± concave abaxially, 1.3–1.8 × 2–2.5 mm, apex depressed, dehiscing freely into 10, 1-seeded segments, segments falling freely, false septa nearly complete, proximal margins usually sparsely and inconspicuously few-ciliate.

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

1–1.5 × 0.6–0.9 mm.

4–6 × 2.5–3 mm.

= 36.

= 30.