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, terete, 18–100(–160) cm, well branched distally, densely gray-villous proximally, mixed villous and glandular puberulent distally, often with raised strigillose lines decurrent from margins of petioles.

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 proximal to inflorescence, alternate distally, petioles 1–3 mm proximally, sessile distally;

blade narrowly lanceolate or oblong-lanceolate, 3–12 × 0.5–2.5 cm, often exceeding internodes, base rounded to broadly cuneate, margins serrulate, with 15–60 teeth per side, veins 4–8 per side, apex subacute, surfaces ± densely villous, hairs sometimes appressed;

bracts usually much reduced.

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

erect racemes or often leafy panicles.

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;

buds 3.5–5.5 × 1.8–3 mm;

pedicel 3–10 mm;

floral tube 1–1.9 × 1.3–2.5 mm, a ring of spreading hairs at mouth within, densely villous and glandular puberulent abaxially;

sepals narrowly lanceolate, often keeled, 2.5–6 × 1–1.5 mm;

petals usually pink to rose-purple, rarely white, broadly obovate, 4–8.5 × 3–4.5 mm, apical notch 1–4 mm;

filaments cream to light purple, those of longer stamens 2–6 mm, those of shorter ones 1–3.5 mm;

anthers oblong, 0.8–1.3 × 0.4–0.6 mm;

ovary 10–30 mm, mixed villous and glandular puberulent;

style white to pink, 2.2–6 mm, glabrous, stigma deeply 4-lobed, 1–1.5 × 2.2–4 mm, lobes 1–1.8 mm, initially erect, later recurved, surrounded by or barely exserted beyond anthers.

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

30–70 mm, surfaces usually glandular puberulent, often mixed villous, rarely glabrescent;

pedicel 5–18 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.

obovoid, 0.8–1.1 × 0.4–0.5 mm, chalazal collar inconspicuous, brown, surface coarsely papillose;

coma easily detached, dingy white, 5–9 mm.

= 36.

= 36.