Flora of North America species comparison

sparsely hirsute to pilose, trichomes white.

opposite;

petiole 0.8–8.6 cm, sparsely to densely hirsute abaxially, densely hirsute adaxially;

blade ovate, elliptic-ovate, or broadly ovate, (2.5–)4.2–14.9 × (1.7–)2.1–12 cm, unlobed, base cordate, truncate, or cuneate, margins dentate to serrate, apex acute to acuminate, abaxial surface grayish, uniformly velutinous, pilose, or tomentose, trichomes at 40x conspicuously tuberculate, 0.3–1 mm, adaxial surface green, sparsely hirsute.

compact, 150–500-flowered, dome-shaped to hemispheric, 3.5–14.5 × 3–16.5 cm;

peduncle 0.5–6 cm, sparsely to densely tomentose.

0.8–2.8 mm, glabrous or sparsely to densely hirsute.

hypanthium usually adnate to ovary to near its apex, rarely ca. 2/3 up ovary, 0.7–1 × 0.8–1.2 mm, strongly 8–10-ribbed in fruit, glabrous;

sepals deltate to triangular, 0.3–0.5 × 0.3–0.6 mm, margins entire, apex acute to acuminate, abaxial surface glabrous;

petals caducous, white to yellowish white, elliptic to narrowly ovate, 1.2–1.5 × 0.7–1.1 mm;

filaments 1.8–4.5 × 0.1–0.2 mm;

anthers 0.3–0.5 mm;

pistils 2(–3)-carpellate, ovary completely inferior or nearly so;

styles 2(–3), distinct, 0.8–1.1 mm.

hemispheric, (1.2–)1.5–2.3 × (1.2–)2–2.8 mm.

0.3–0.6(–0.8) mm.

flowers absent or present, white or greenish white, tube 4–21 mm, lobes 3–4(–5), obovate to broadly ovate, round, or elliptic, 6.5–15 × 2.5–14 mm.

= 36.