Flora of North America species comparison

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

ascending or sometimes decumbent at base, usually freely branched.

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.

blade linear to lanceolate or narrowly elliptic, 10–30 × 2–3(–7) mm.

corymbs.

cymes, few-flowered.

1–10 mm.

10–25 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.

heterostylous;

sepals lanceolate, 7–11 mm, margins glabrous, apex acuminate;

petals bright red to maroon, fading to purple, broadly obovate, 15–30 mm;

stamens 8–10 mm;

anthers 5 mm;

staminodia not seen;

styles connate proximal 1/2, 4.5 mm (short-styled) or 8–10 mm (long-styled);

stigmas 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-globose, 6–7 mm diam., apex apiculate, segments persistent on plant, margins not seen.

1–1.5 × 0.6–0.9 mm.

2–3 × 0.5–1 mm.

= 36.

= 16.