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.

several, ascending to suberect, loosely clumped, subterete, 15–75 cm, simple or sparsely branched distally, subglabrous proximal to inflorescence with densely strigillose lines decurrent from margins of petioles, mixed strigillose and glandular puberulent distally.

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 proximal to inflorescence, alternate distally, petioles 1–3 mm proximally, subsessile distally;

blade ovate or elliptic, 2.5–7.8 × 1.2–3.5 cm, base attenuate, margins denticulate with 8–20 low, ± pellucid teeth per side, 4–7 prominent veins per side, apex acute to acuminate, surfaces subglabrous with scattered strigillose hairs on margin and abaxial midrib;

bracts much reduced, narrower, more acuminate and denticulate.

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

nodding, later erect, racemes, congested, simple to sparsely branched, densely mixed 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;

buds 6–10 × 4–5 mm;

pedicel 5–8 mm;

floral tube 1.2–3 × 3–4.6 mm, ring of spreading hairs at mouth inside;

sepals greenish cream, lanceolate, 10–12 × 3–3.5 mm, abaxial surface densely glandular puberulent;

petals cream to pale yellow, 12–22 × 9–13 mm, broad apical notch 1.2–2.4 mm;

filaments cream, those of longer stamens 13–16.5 mm, those of shorter ones 10–15 mm;

anthers yellow, 2.2–3 × 0.7–1.3 mm;

ovary 20–35 mm, densely glandular puberulent;

style cream, 15–22 mm, stigma 4-lobed, 1–2 × 2.8–4.5 mm, lobes spreading to recurved, strongly exserted beyond anthers.

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

erect, 35–75 mm, surfaces sparsely glandular puberulent;

pedicel 10–22 mm.

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.

narrowly fusiform or oblanceoloid, 1–1.2 × 0.4–0.5 mm, chalazal collar 0.06–0.1 mm, surface reticulate;

coma persistent, tawny, 6.5–8 mm.

= 36.

= 36.