Flora of North America species comparison

erect, strict, terete, 4–55 cm, simple or well branched in age, subglabrous proximally to mixed strigillose and glandular puberulent distally, with raised strigillose lines decurrent from margins of petioles.

terete, 4.5–55 cm, simple or with proximal ascending branches and/or distal branches, ± densely villous and/or strigillose, mixed glandular puberulent distally or glabrescent.

opposite proximal to inflorescence, alternate and reduced distally, often ± appressed, usually subsessile, rarely petiole 1–3 mm, often clasping;

blade obovate proximally to ovate, lanceolate, or narrowly elliptic distally, 1–5.5(–6.5) × 0.4–2(–2.4) cm, base rounded or obtuse, margins low denticulate, 9–30 teeth per side, veins ± conspicuous, 3–6 per side, apex subacute, surfaces subglabrous with strigillose margins;

bracts much reduced.

opposite only in proximal pairs, alternate and crowded distally, subsessile, blade narrowly elliptic or lanceolate, 1.2–5 × 0.2–1.2 cm, usually longer than internodes, base cuneate to attenuate, margins subentire or sparsely serrulate, 3–5 teeth per side, veins inconspicuous, 2–7 per side, apex acute, surfaces villous;

bracts same size and shape as leaves.

erect, sometimes nodding in bud, racemes, sometimes sparsely branched.

erect spikes, often congested proximally, sometimes nodding in bud, simple, or sometimes sparsely branched, ± densely mixed villous, strigillose, and glandular puberulent.

erect;

buds 2–3.5 × 1.8–2.5 mm;

pedicel 0–1 mm;

floral tube 0.8–1.4 × 0.8–1.9 mm, ring of sparse spreading hairs at mouth inside;

sepals sometimes flushed red, 1.2–3.5 × 0.6–1.4 mm, abaxial surface strigillose and sometimes mixed glandular puberulent;

petals usually white, infrequently pink, 2.2–5(–7) × 1.7–3.2 mm, apical notch 0.4–1.5 mm;

filaments usually cream, rarely light pink, those of longer stamens 2–3.5 mm, those of shorter ones 1–2 mm;

anthers cream to light yellow, 0.3–0.8 × 0.3–0.5 mm;

ovary 9–30 mm, densely strigillose and glandular puberulent;

style cream or yellow, 1.6–2.8 mm, stigma usually narrowly to broadly clavate, rarely subcapitate, 1–3 × 0.8–2 mm, surrounded by at least longer anthers.

erect, mostly chasmogamous, sometimes initiating at second or third proximal node;

buds 3–5 × 2.5–3.5 mm, apex blunt;

floral tube 1.5–3 × 1.1–2.8 mm, ring of lax hairs near base inside;

sepals erect, (1.5–)2–6.2 × (0.5–)1–2.2 mm, densely villous and glandular pubescent abaxially;

petals rose-purple, (2.8–)4.2–9.8 × (2.2–)3.5–5.3 mm, apical notch 1.2–3.5 mm;

filaments rose-purple, those of longer stamens 2.4–6.5 mm, those of shorter ones 0.9–4.3 mm;

anthers 0.6–1.6 × 0.2–0.8 mm;

ovary 3.5–9 mm, densely pubescent;

style pink, 3.3–9.2 mm, stigma 4-lobed, ± subentire in smaller flowers, 0.7–1.4 × 0.5–1.3 mm, usually surrounded by, rarely exserted beyond, longer anthers.

30–55(–70) mm, surfaces mixed strigillose and glandular puberulent; usually subsessile, rarely pedicel 1–5 mm, often appressed to stem.

narrowly fusiform, (10–)14–21 × 1–2.1 mm, beak 2–5 mm, ribs usually broad and prominent, septa and central column disintegrating with age, surfaces ± densely villous;

subsessile.

very narrowly obovoid, 1–1.6(–1.8) × 0.4–0.6 mm, chalazal collar 0.1–0.2 mm, light brown or gray, surface rugose to papillose;

coma usually readily detached, white, 3–9 mm.

8–12 per capsule, initially in 4 locules, at maturity pushed into 2 rows proximally, 1 overlapping row distally, irregularly angular-fusiform, 1.8–2.3x 0.7–0.9 mm, chalazal collar absent, surface irregularly reticulate.

= 36.

= 20.