Flora of North America species comparison

strict, erect, terete, 2–50(–60) cm, rarely branched only in larger plants, subglabrous proximal to inflorescence except for raised strigillose lines decurrent from margins of petioles, or sometimes ± densely long-villous throughout with inconspicuous decurrent lines.

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 proximally, alternate on inflorescence, subsessile or proximally with petioles 1–1.5 mm;

blade ovate proximally to lanceolate or narrowly elliptic distally, 0.5–4.7 × 0.2–1.4 cm, base rounded to cuneate, margins subentire proximally to denticulate distally, 8–20 teeth per side, veins inconspicuous, 3–6 per side, apex obtuse to subacute, surfaces mostly glabrous with strigillose margins;

bracts much reduced.

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 nodding in bud, erect later, open racemes, sometimes congested, usually mixed strigillose and glandular puberulent, rarely also mixed villous, or rarely subglabrous.

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

erect;

buds 2–5 × 1–2 mm;

pedicel 3–8 mm;

floral tube 0.5–1.7 × 0.8–1.6 mm, with slightly raised ring of spreading hairs at mouth inside;

sepals green, 1.2–2.8 × 0.5–1 mm, abaxial surface subglabrous or sparsely glandular puberulent;

petals white, often fading pink, 1.6–5.5 × 1.2–3 mm, apical notch 0.3–1.2 mm;

filaments white or cream, those of longer stamens 0.6–2.5 mm, those of shorter ones 0.4–1.5 mm;

anthers cream, 0.2–0.9 × 0.2–0.5 mm;

ovary 10–14 mm, strigillose and glandular puberulent or subglabrous;

style cream, 0.8–5 mm, stigma clavate, entire, 0.4–1.2 × 0.3–0.7 mm, 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.

very narrowly cylindrical, (15–)24–60 mm, surfaces usually subglabrous to mixed strigillose and glandular puberulent, rarely sparsely villous;

pedicel 8–40 mm.

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

pedicel 15–45 mm.

narrowly fusiform to narrowly obovoid, 1.1–1.6 × 0.4–0.6 mm, chalazal collar ± conspicuous, 0.05–0.2 mm, light brown, surface papillose;

coma easily detached, white, 3–6 mm.

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.