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 or ascending, often clumped, often flushed red, terete, 8–30 cm, simple or branched, glabrous proximal to inflorescence except for elevated strigillose lines decurrent from margins of petiole, strigillose throughout 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 proximal to inflorescence, alternate distally, petiole broad, 3–5 mm proximally to subsessile distally;

blade lanceolate or elliptic to narrowly lanceolate distally, 0.8–4 × 0.4–1.3 cm, base attenuate to cuneate, margins subentire to denticulate distally, 5–9 teeth per side, veins 3 or 4 per side, apex obtuse to distally acute, surfaces glabrous with sparsely strigillose margins and abaxial midrib;

bracts reduced and narrower.

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

nodding to suberect, racemes, strigillose.

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 2–4 × 1.5–2.5 mm;

pedicel 7–12 mm;

floral tube 1–2 × 1–2 mm, with ring of spreading hairs at mouth inside;

sepals green, narrowly lanceolate, 3–4 × 0.8–1.2 mm;

petals white fading to pink, 4–6.5 × 2.3–4 mm, apical notch 0.8–1.6 mm;

filaments white, those of longer stamens 2.2–3 mm, those of shorter ones 1.2–1.6 mm;

anthers 0.4–0.8 × 0.4–0.6 mm;

ovary 12–18 mm, densely strigillose;

style white, 3.2–4 mm, stigma cream, broadly clavate, 0.6–1.5 × 0.6–1.2 mm, surrounded by at least longer anthers.

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

often reddish green, 25–55 mm, thin, surfaces sparsely strigillose;

pedicel 15–38 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.

subfusiform, 0.8–1.2 × 0.3–0.4 mm, chalazal collar inconspicuous, 0.02–0.06 mm, light brown, surface papillose;

coma persistent, tawny, 3–6 mm.

= 36.

= 36.