Flora of North America species comparison

erect or ascending, subterete, 20–80 cm, often well branched from base, sometimes also distally, subglabrous proximal to inflorescence with raised strigillose lines decurrent from margins of petioles, strigillose distally.

opposite proximal to inflorescence, alternate distally, petiole 0–2 mm;

blade green or slightly bluish green, lanceolate to narrowly ovate, 1.5–10 × 0.4–1.8 cm, ± shorter than internodes, base rounded to attenuate, margins denticulate with 15–40 evenly spaced teeth per side, veins prominent, 3–7 per side, apex subacute, surfaces sparsely strigillose, mainly on margins and veins;

bracts gradually reduced.

erect racemes or sparse panicles, strigillose.

erect;

buds 2–5 × 1–2.5 mm;

pedicel 2–14 mm;

floral tube 0.8–1 × 1.1–1.5 mm, conspicuous ring of spreading hairs at mouth inside, mixed strigillose and sparse glandular puberulent externally;

sepals lanceolate, somewhat keeled, 2.5–4 × 1–1.3 mm, abaxial surface strigillose;

petals rose-purple, 3.5–6 × 1.8–3 mm, apical notch 0.8–1.4 mm;

filaments pale pink, those of longer stamens 2–2.2 mm, those of shorter ones 0.8–1.3 mm;

anthers yellow, 0.7–0.8 × 0.4–0.5 mm;

ovary 12–38 mm, strigillose;

style white, 2.5–3.5 mm, glabrous, stigma clavate, 1.5–2 × 0.6–0.8 mm, surrounded by longer anthers.

40–70 mm, surfaces strigillose;

pedicel 4–16 mm.

narrowly obovoid, 0.9–1 × 0.3–0.4 mm, chalazal collar inconspicuous, brown, surface coarsely papillose;

coma readily detached, dull white, 4–5 mm.

= 36.