Flora of North America species comparison

erect, strict, terete, 4–55 cm, simple or well branched in age, subglabrous proximally to mixed strigillose and glandular puberulent distally, with raised strigillose lines decurrent from margins of petioles.

erect, rarely clumped, terete, 10–40(–45) cm, usually simple, rarely branched, glabrous proximal to inflorescence with sparsely strigillose raised lines decurrent from margins of petioles, mixed strigillose and glandular puberulent distally.

opposite proximal to inflorescence, alternate and reduced distally, often ± appressed, usually subsessile, rarely petiole 1–3 mm, often clasping;

blade obovate proximally to ovate, lanceolate, or narrowly elliptic distally, 1–5.5(–6.5) × 0.4–2(–2.4) cm, base rounded or obtuse, margins low denticulate, 9–30 teeth per side, veins ± conspicuous, 3–6 per side, apex subacute, surfaces subglabrous with strigillose margins;

bracts much reduced.

opposite and crowded proximal to inflorescence, alternate and scattered distally, subsessile;

blade narrowly oblong or narrowly lanceolate to linear, (1.2–)2–4.5 × 0.1–0.5 cm, base attenuate, margins irregularly denticulate, 2–4 teeth per side, veins inconspicuous, 3 or 4 per side, apex subacute to obtuse or ± truncate, surfaces glabrous with sparsely strigillose margins and adaxial midrib;

bracts much reduced and narrower.

erect, sometimes nodding in bud, racemes, sometimes sparsely branched.

nodding in bud, suberect later, racemes, simple, mixed strigillose and glandular puberulent, sometimes subglabrous.

erect;

buds 2–3.5 × 1.8–2.5 mm;

pedicel 0–1 mm;

floral tube 0.8–1.4 × 0.8–1.9 mm, ring of sparse spreading hairs at mouth inside;

sepals sometimes flushed red, 1.2–3.5 × 0.6–1.4 mm, abaxial surface strigillose and sometimes mixed glandular puberulent;

petals usually white, infrequently pink, 2.2–5(–7) × 1.7–3.2 mm, apical notch 0.4–1.5 mm;

filaments usually cream, rarely light pink, those of longer stamens 2–3.5 mm, those of shorter ones 1–2 mm;

anthers cream to light yellow, 0.3–0.8 × 0.3–0.5 mm;

ovary 9–30 mm, densely strigillose and glandular puberulent;

style cream or yellow, 1.6–2.8 mm, stigma usually narrowly to broadly clavate, rarely subcapitate, 1–3 × 0.8–2 mm, surrounded by at least longer anthers.

erect, sometimes starting in third most-proximal node;

buds 3–6.5 × 1–2 mm;

pedicel 4–15 mm;

floral tube 0.7–1.6 × 1–2.2 mm, with or often without ring of spreading hairs at mouth inside;

sepals 1.2–3.5 × 0.7–1.2 mm, apex subacute;

petals white, 2–5.5 × 1.2–3.1 mm, apical notch 0.3–1 mm;

filaments white or cream, those of longer stamens 1–2.5 mm, those of shorter ones 0.5–1.4 mm;

anthers cream, 0.4–0.6 × 0.3–0.5 mm;

ovary usually purplish red, 10–20 mm, sparsely mixed strigillose and glandular puberulent or subglabrous;

style cream or white, 0.7–2.5 mm, stigma cylindrical to clavate, entire, 0.8–2 × 0.2–1.2 mm, surrounded by anthers.

30–55(–70) mm, surfaces mixed strigillose and glandular puberulent; usually subsessile, rarely pedicel 1–5 mm, often appressed to stem.

slender, 30–55 mm, surfaces sparsely strigillose and glandular puberulent;

pedicel 8–38 mm.

very narrowly obovoid, 1–1.6(–1.8) × 0.4–0.6 mm, chalazal collar 0.1–0.2 mm, light brown or gray, surface rugose to papillose;

coma usually readily detached, white, 3–9 mm.

narrowly attenuate, 1.4–2 × 0.3–0.5 mm, chalazal collar conspicuous, 0.1–0.3 mm, light brown or blond, surface papillose;

coma persistent, white, 3–5 mm.

= 36.

= 36.