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.

several to many, ascending or erect, terete, loosely clumped, 40–100 cm, usually well-branched apically, ± glabrous and glaucous proximal to inflorescence, without distinct raised lines, sparsely mixed strigillose and glandular pubescent proximally.

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 broad, 1–3 mm;

blade narrowly lanceolate to narrowly ovate, 3–9 × 0.7–2.5 cm, base rounded to cuneate, margins finely serrulate, 20–40 teeth per side, veins reddish green, conspicuous, 6–10 per side, apex acute, surfaces glabrous and often glaucous, crowded proximally;

bracts much reduced and narrower.

erect racemes, densely strigillose, often mixed sparsely glandular puberulent.

erect racemes or open panicles, often branched, glandular puberulent, sometimes mixed 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 5–8 × 2–3.5 mm, often with stigma exserted;

pedicel 2–4 mm;

floral tube 2–3 × 1.8–3 mm, with ring of spreading hairs near base of tube inside;

sepals often flushed red, 6–10 × 2.1–2.8 mm, abaxial surface mixed strigillose and glandular puberulent;

petals dark pink to rose-purple, (6–)10–15 × 4.5–6 mm, apical notch 2.6–3 mm;

filaments cream or light pink, those of longer stamens 6–8 mm, those of shorter ones 3.5–4.5 mm;

anthers cream or yellow, 1–1.2 × 0.5–0.6 mm;

ovary 20–25 mm, densely glandular puberulent and mixed strigillose;

style cream or yellow, 9–13 mm, stigma broadly and sometimes irregularly 4-lobed, 1–1.5 × 2.1–2.9 mm, exserted beyond anthers.

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

pedicel 10–35 mm.

25–45 mm, surfaces mixed sparsely glandular puberulent and strigillose, often with reduced fertile seed set;

pedicel 3–6 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, 0.9–1.3 × 0.4–0.5 mm, chalazal collar 0.1–0.15 × 0.2–0.25 mm, gray-brown, surface with conspicuous parallel longitudinal ridges of laterally flattened papillae;

coma readily detached, white, 4–6 mm.

= 36.

= 36.