Flora of North America species comparison

erect, green or tan to reddish green, terete, (3–)10–120(–190) cm, often thick, well branched or simple, subglabrous proximal to inflorescence with raised strigillose lines decurrent from margins of petioles, ± densely mixed strigillose and glandular puberulent distally, rarely densely strigillose or densely villous throughout.

ascending to suberect, often clumped, terete, 15–50 cm, usually simple, rarely branched proximally, subglabrous proximal to inflorescence except for raised densely strigillose lines decurrent from margins of petioles, usually mixed strigillose and glandular puberulent distally.

opposite proximal to inflorescence, alternate distally, petiole 0–5(–10) mm, often subsessile distally, sometimes clasping;

blade narrowly obovate, obovate, broadly elliptic, or spatulate proximally, to very narrowly lanceolate to ovateor broadly elliptic distally, (1–)3–12(–16) × (0.2–)0.6–5.5 cm, base rounded to cuneate or short-attenuate, margins serrulate, (8–)15–40 irregular teeth per side, veins prominent, 4–10 per side, apex obtuse to acute or subacuminate, surfaces usually subglabrous with strigillose margins, rarely densely strigillose or villous;

bracts scarcely reduced to very reduced and narrower.

opposite proximal to inflorescence or just proximal 1/3, alternate distally, petiole 3–12 mm, ± winged;

blade broadly spatulate to ovate proximally, narrowly ovate to narrowly lanceolate distally, 2–5.5 × 0.8–2.4 cm, base attenuate to cuneate, margins subentire proximally to denticulate distally with 7–16 teeth per side, more marked distally, lateral veins inconspicuous, 4–8 per side, apex obtuse proximally to subacute distally, surfaces glabrous except for strigillose margins;

bracts reduced and narrower.

usually erect, rarely nodding, racemes or panicles, well branched and open, to simple and congested, ± densely strigillose and glandular puberulent.

nodding in bud, later erect, ± open racemes, mixed strigillose and glandular puberulent.

erect;

buds 1.5–7 × 1–3 mm;

pedicel 2–14(–20) mm;

floral tube 0.5–2.6 × 0.9–3.5 mm, ring of spreading hairs at mouth inside;

sepals often reddish green, lanceolate, sometimes keeled, 2–7.5 × 0.7–2.5 mm;

petals white or pink to rose-purple, obovate, 2–14 × 1.3–6.3 mm, apical notch 0.4–2.5 mm;

filaments white to dark pink, those of longer stamens 1.4–7 mm, those of shorter ones 0.6–5.2 mm;

anthers light yellow to cream, 0.5–1.8 × 0.3–0.9 mm;

ovary often reddish green, 8–40 mm, ± densely mixed strigillose and glandular pubescent;

style cream to light yellow, 1.1–8.5 mm, stigma cream to orange-yellow, narrowly to broadly clavate or subcapitate, 0.8–2.8 × 0.4–1.2 mm, rarely indented apically, usually surrounded by, rarely exserted beyond, anthers.

suberect;

buds 2–5 × 1.5–3.5 mm;

pedicel 5–15 mm;

floral tube 1–2.2 × 1–3 mm, inner surface glabrous without ring;

sepals often flushed purplish red, frequently keeled, (2–)3–5.5 × 0.9–1.8 mm, abaxial surface sparsely glandular puberulent, sometimes mixed strigillose;

petals white, rarely with red veins or flushed light pink, 3–8.5 × 1.6–4.5 mm, apical notch 0.7–1.4 mm;

filaments white to cream, those of longer stamens 1.4–4 mm, those of shorter ones 1.1–3 mm;

anthers light yellow, 0.4–0.9 × 0.3–0.6 mm;

ovary 20–40 mm, glandular puberulent;

style cream or white, 1.4–4.6 mm, stigma clavate or rarely subcapitate and indented apically, entire, 1.2–2.5 × 0.4–1.6 mm, surrounded by anthers.

erect, (15–)30–100 mm, surfaces usually strigillose and glandular puberulent, rarely glabrescent;

pedicel 2–15(–40) mm, rarely subsessile.

slender, sometimes flushed reddish green, ± ascending, 50–100 mm, surfaces sparsely glandular puberulent;

pedicel 15–45 mm.

narrowly obovoid or subfusiform, (0.6–)0.8–1.6(–1.9) × 0.3–0.6 mm, chalazal collar ± conspicuous, 0.1–0.3 × 0.2–0.4 mm, grayish tan to brown, surface with conspicuous parallel longitudinal ridges of laterally flattened papillae;

coma readily detached, white or dingy white, 2–8 mm, very rarely absent.

narrowly obovoid, 1.1–1.7 × 0.4–0.6 mm, chalazal collar 0.05–0.1 mm, blond or light brown, surface reticulate or sometimes barely rugose;

coma easily detached, white, 7–14 mm.

= 36.

= 36.