Flora of North America species comparison

erect, simple to loosely clustered, terete, 15–95 cm, simple to well branched, densely strigillose, often mixed glandular puberulent on inflorescence, rarely with faint strigillose lines decurrent from margins of petioles.

erect to ascending, often clumped but not matted, green or gray-green, terete, 10–110(–120) cm, usually well-branched throughout, sometimes simple, strigillose and/or long-villous, usually mixed glandular puberulent distally, rarely glabrate.

opposite proximally, usually alternate, rarely fasciculate distally, subsessile;

blade linear to very narrowly elliptic or sublanceolate, 2–7.5 × 0.1–0.7 cm, usually longer than internodes, base rounded to subcuneate, margins subentire, 4–7 inconspicuous teeth per side, sometimes revolute, lateral veins inconspicuous, apex obtuse proximally to acute distally, both surfaces densely strigillose, increasing distally;

bracts not much reduced.

± densely spaced, alternate and often fasciculate distally, subsessile, blade grayish green or green to silvery-canescent, usually narrowly linear to lanceolate or elliptic to ovate, rarely orbiculate, 0.6–5(–6) × 0.1–2.5 cm, base cuneate to attenuate, margins subentire to sharply toothed, 3–15 teeth per side, veins inconspicuous or prominent, 3–7 per side, apex acute, sometimes with caducous dark mucro, surfaces usually ± densely strigillose, sometimes mixed villous and/or glandular puberulent, rarely glabrate;

bracts much smaller and narrower.

erect racemes, densely strigillose, often mixed sparsely glandular puberulent.

erect spikes or racemes, loose to congested, often branched, glandular puberulent and sometimes mixed strigillose or villous.

erect;

buds 3–5 × 1.5–2.5 mm;

pedicel 5–12 mm;

floral tube 0.8–1.5 × 1.2–1.8 mm, ring of spreading hairs at mouth inside;

sepals 2.5–4.5 × 0.9–1.3 mm, abaxial surface strigillose;

petals obcordate, white to light pink, 3.5–7 × 1.6–4 mm, apical notch 1–1.8 mm;

filaments white or cream, those of longer stamens 0.8–3.5 mm, those of shorter ones 0.6–2.5 mm;

anthers cream, 0.5–0.9 × 0.4–0.6 mm;

ovary 12–18 mm, densely strigillose, sometimes mixed glandular puberulent;

style cream, 2–3.8 mm, stigma narrowly clavate, entire, 1–1.8 × 0.5–1.2 mm, usually surrounded by, rarely exserted beyond, anthers.

buds 11–18 × 4–6 mm, subsessile or pedicels 1–2 mm;

floral tube same color as petals, 16–32 × 5–8 mm, base slightly bulbous, ring of 8 irregular scales at base of filaments 4–6.5 mm from base inside;

sepals same color as petals, 7–15 × 3.5–5 mm, abaxial surface densely pubescent;

petals usually orange-red, very rarely white, obcordate, 8–17 × 5–9.5 mm, apical notch 2–3 mm;

filaments light orange-red to white, those of longer stamens 12.5–32 mm, those of shorter ones 10–25 mm;

anthers 2.7–4x 0.8–1.2 mm, apiculate;

ovary 8–15 mm, glandular puberulent, often mixed villous;

style light orange-red, 42–65 mm, glabrous, stigma 4-lobed, 1–1.4 × 2.4–3 mm, exserted 8–15 mm beyond anthers.

straight, narrowly cylindrical, 35–80 mm, surfaces densely strigillose;

pedicel 10–35 mm.

straight or ± curved-ascending, 15–35 mm, sometimes beaked, surfaces glandular puberulent and strigillose;

subsessile or pedicel 0–3 mm.

narrowly fusiform to narrowly obovoid, 1.5–2.2 ×0.5–0.7 mm, chalazal collar 0.1–0.2 mm, ± pronounced, surface papillose;

coma persistent, dingy white, 6–8 mm.

broadly to narrowly obovoid, with constriction 0.6–0.8 mm from micropylar end, 1.5–2.6 × 0.9–1.3 mm, chalazal collar inconspicuous, light brown, surface low papillose;

coma easily detached, dingy white, 5.5–7 mm.

= 36.