Flora of North America species comparison

opposite;

petiole 0.1–3 mm, glabrous or puberulent (base ciliate);

blade usually oblong to linear, sometimes oval, 1.5–4.5 × 0.3–1.5 cm, margins usually revolute, apex obtuse to acute, abaxial surface puberulent, adaxial glabrate with puberulent bands on either side of midrib, midribs on both surfaces covered with purple, clavate trichomes.

opposite;

petiole absent or 0.1–2 mm, glabrous or puberulent;

blade ovate or oval to narrowly lanceolate, 0.3–0.8 × 0.2–0.4 cm, margins revolute, apex obtuse, abaxial surface tomentulose, adaxial glabrous or sparsely puberulent toward base, midribs with stalked glands/purple clavate trichomes.

solitary flowers or terminal, corymbiform racemes, 3–8(–17)-flowered.

terminal, corymbiform racemes or umbels, 2(–6)-flowered, sometimes flowers solitary.

15–30 mm.

5–20 mm.

sepals pale, translucent, white to light pink, ovate, 2.9–4 mm, apex obtuse, surfaces glabrous, margins ciliate;

petals connate their entire lengths, usually rose-purple or pink, rarely white, 9–11 × 12–18 mm, glabrous except puberulent near base abaxially;

filaments 4–5 mm;

style 4.5–7 mm.

sepals crimson, ovate-lanceolate, 1.2–1.5 mm, apex obtuse, surfaces glabrous, margins ciliate;

petals (spreading), connate ca. 1/2 their lengths, light to deep pink or white, 3–5 × 2–3.5 mm, glabrous;

stamens 5;

filaments 2–3 mm;

style 0.5–0.8 mm.

5-locular, 4–6 × 4–7 mm, glabrous.

2–3-locular, 3–4 × 3–4 mm, glabrous.

winged, oblong, 1.5–2.2 mm.

winged, oblong, 0.5–1.4 mm.

= 48.

= 24.