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.

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

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

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.

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

pedicel 10–35 mm.

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

pedicel 10–22 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.

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.