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, loosely clustered, terete, 5–80 cm, simple to well branched, subglabrous on proximal internodes, sometimes with faint strigillose lines decurrent from margins of petioles, densely strigillose distally.

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.

opposite proximal to inflorescence, alternate distally, subsessile;

blade lanceolate or narrowly elliptic to sublinear, 1.5–7 × 0.2–1.9 cm, base cuneate, margins entire or inconspicuously denticulate, 2–6 teeth per side, veins inconspicuous, apex acute or acuminate, surfaces strigillose abaxially, subglabrous adaxially or strigillose only on margins and veins;

bracts smaller and narrower.

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

nodding in bud, later erect, racemes, not branched, densely strigillose, rarely mixed sparsely glandular puberulent.

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.

erect to spreading;

buds 2–5 × 1.5–2.5 mm;

pedicel 8–12 mm;

floral tube 0.6–1.8 × 1.3–2.2 mm, ring of spreading hairs at mouth inside;

sepals 1.4–4.5 × 0.8–1.5 mm, abaxial surface strigillose;

petals usually white, rarely pink, 2–9 × 1.8–5 mm, obcordate, apical notch 0.6–1.6 mm;

filaments cream or white, those of longer stamens 0.8–3.5 mm, those of shorter ones 0.4–2.1 mm;

anthers 0.4–1 × 0.3–0.7 mm;

ovary 12–35 mm, strigillose;

style cream, 1.5–4.5 mm, stigma clavate to cylindrical, entire, 0.8–2 × 0.5–1.4 mm, usually surrounded by, rarely exserted beyond, anthers.

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

pedicel 10–35 mm.

straight or upcurved, 25–90 mm, surfaces strigillose;

pedicel 15–35(–60) 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.

elliptic, attenuate to narrowly fusiform, 1.4–2.2 × 0.4–0.5 mm, chalazal collar 0.1–0.25 mm, conspicuous, surface finely papillose;

coma persistent, white, 5–7 mm.

= 36.

= 36.