Hydrangea quercifolia W.Bartram

Shrubs, 10–20 dm. Twigs densely tomentose, trichomes brown or orangish brown, sometimes white. Leaves opposite; petiole (1–)1.5–8(–12.6) cm, densely tomentose; blade suborbiculate to ovate, (2.8–)7–26.4 × (2.6–)6.5–26.5 cm, (3–)5(–7)-lobed, base truncate to cuneate, margins coarsely serrate, apex acute to acuminate, abaxial surface grayish, pilose to tomentose, trichomes at 40× either smooth, 1–4 mm, or tuberculate, 0.4–1 mm, adaxial surface green, glabrous or sparsely hirsute. Inflorescences open or compact, 500–1000-flowered, ovoid to conic, 9–32 × (6–)8–14 cm; peduncle 4.3–7.3 cm, sparsely tomentose to hirsute. Pedicels 1–3 mm, usually glabrous, rarely sparsely hirsute. Sterile flowers present, white, greenish white, pink, or reddish, tube 11–31 mm, lobes 4(–5), obovate to broadly ovate or round, 6–20 × 5–20 mm. Bisexual flowers: hypanthium adnate to ovary to near its apex, 0.9–1.3 × 1.2–2.5 mm, strongly (7–)8–10-ribbed in fruit, glabrous; sepals deltate to shallowly triangular, (0.3–)0.5–0.9 × 0.5–1 mm, margins entire, apex acute to acuminate, abaxial surface glabrous; petals caducous, white or yellowish white, elliptic, oblong, or spatulate, 1.5–2.6 × 0.7–1.4 mm; filaments 2.5–5(–6) × 0.1–0.2 mm; anthers 0.3–0.6 mm; pistil 2–4-carpellate, ovary completely inferior; styles 2–4, distinct, 1.5–2.5 mm. Capsules hemispheric to suburceolate, 1.5–2.5 × 2–2.5 mm. Seeds 0.6–0.8 mm. 2n = 36.

Can be grown by cuttings.