Flora of North America species comparison

strict, erect, sometimes reddish green, terete, 3.5–40 cm, simple or freely branched, subglabrous proximally to strigillose and glandular puberulent distally.

delicate, erect, loosely clumped, terete, 5–20 cm, simple or branched from base, densely glandular puberulent, without decurrent lines.

alternate distally, not fasciculate, petiole 0–2 mm, blade subspatulate proximally to lanceolate, oblanceolate, or narrowly elliptical distally, not folded along midrib, 0.9–2.5 × 0.2–0.6 cm, shorter than internodes, base tapered, margins entire or scarcely denticulate, 1–4 teeth per side, lateral veins obscure, apex subacute or often blunt proximally, surfaces subglabrous or with scattered hairs along margins;

bracts much reduced, sometimes attached to pedicel.

opposite proximal to inflorescence, alternate distally, subsessile;

blade broadly obovate to orbiculate proximally to ovate or lanceolate distally, 0.4–2 × 0.3–1.2 cm, base cuneate to rounded, margins finely denticulate, 4–6 low teeth per side, veins indistinct, 2–6 per side, apex obtuse to subacute distally, surfaces subglabrous with strigillose margins and veins or both surfaces sparsely strigillose distally;

bracts much reduced and narrower.

erect racemes or open panicles, relatively loose and uncrowded, branches thin, mixed strigillose and glandular puberulent.

erect, open racemes, glandular puberulent.

erect or, sometimes, nodding in bud;

buds broadly ovoid, 1.2–2.5 × 1–1.5 mm;

floral tube 1.1–1.5 × 1–1.4 mm, usually with ring of spreading hairs at mouth inside;

sepals 0.5–2.5 × 0.4–1.3 mm, apex acute, abaxial surface strigillose, sometimes mixed glandular puberulent;

petals white to pink, 2–5 × 1.5–3 mm, apical notch 0.2–1.9 mm;

filaments white, those of longer stamens 0.5–3 mm, those of shorter ones 0.3–2 mm;

anthers 0.6–1 × 0.5–0.8 mm;

ovary 4–9 mm, mixed strigillose and glandular puberulent;

style light pink, 1–3.5 mm, stigma subclavate to obscurely 4-lobed, 0.4–0.6 × 0.4–0.5 mm, surrounded by longer anthers.

sometimes cleistogamous;

buds 2–3.5x 1–1.5 mm, often nodding;

pedicel 8–16 mm;

floral tube 0.4–0.8 × 0.5–1 mm, ring of sparse hairs at mouth inside, or absent;

sepals 1.5–2 × 0.8–1 mm;

petals white, 2–3 × 1.5–2 mm, apical notch 0.4–0.5 mm;

filaments white, those of longer stamens 1.8–3 mm, those of shorter ones 1–1.5 mm;

anthers 0.3–0.4 ×0.3–0.4 mm;

ovary 9–12 mm, sparsely glandular puberulent;

style white, 2–3 mm, stigma white, narrowly clavate, entire, 0.5–0.6 × 0.4–0.5 mm, surrounded by anthers.

9–28 mm, surfaces strigillose and glandular puberulent;

pedicel 3–10 mm.

35–45 mm, surfaces subglabrous to sparsely glandular puberulent;

pedicel 25–40 mm.

obovoid, without constriction, 0.9–1.2 × 0.4–0.6 mm, low chalazal collar 0.1–0.2 mm wide, brown, surface reticulate;

coma easily detached, white, 2.5–3 mm.

narrowly oblanceoloid, 0.8–1.1 × 0.3–0.4 mm, chalazal collar inconspicuous, surface low papillose;

coma easily detached, dingy white, 3–6 mm.

= 26.

= 36.