Flora of North America species comparison

erect, simple to loosely clustered, terete, 15–95 cm, simple to well branched, densely strigillose, often mixed glandular puberulent on inflorescence, rarely with faint strigillose lines decurrent from margins of petioles.

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 proximally, usually alternate, rarely fasciculate distally, subsessile;

blade linear to very narrowly elliptic or sublanceolate, 2–7.5 × 0.1–0.7 cm, usually longer than internodes, base rounded to subcuneate, margins subentire, 4–7 inconspicuous teeth per side, sometimes revolute, lateral veins inconspicuous, apex obtuse proximally to acute distally, both surfaces densely strigillose, increasing distally;

bracts not much reduced.

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, densely strigillose, often mixed sparsely glandular puberulent.

erect racemes or sparse panicles, strigillose.

erect;

buds 3–5 × 1.5–2.5 mm;

pedicel 5–12 mm;

floral tube 0.8–1.5 × 1.2–1.8 mm, ring of spreading hairs at mouth inside;

sepals 2.5–4.5 × 0.9–1.3 mm, abaxial surface strigillose;

petals obcordate, white to light pink, 3.5–7 × 1.6–4 mm, apical notch 1–1.8 mm;

filaments white or cream, those of longer stamens 0.8–3.5 mm, those of shorter ones 0.6–2.5 mm;

anthers cream, 0.5–0.9 × 0.4–0.6 mm;

ovary 12–18 mm, densely strigillose, sometimes mixed glandular puberulent;

style cream, 2–3.8 mm, stigma narrowly clavate, entire, 1–1.8 × 0.5–1.2 mm, usually surrounded by, rarely exserted beyond, anthers.

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.

straight, narrowly cylindrical, 35–80 mm, surfaces densely strigillose;

pedicel 10–35 mm.

40–70 mm, surfaces strigillose;

pedicel 4–16 mm.

narrowly fusiform to narrowly obovoid, 1.5–2.2 ×0.5–0.7 mm, chalazal collar 0.1–0.2 mm, ± pronounced, surface papillose;

coma persistent, dingy white, 6–8 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.

= 36.