Mem. Amer. Acad. Arts, n. s. 6: 374, plate 30. 1859.
Shrubs, 6–32 dm, ± strigose. Stems 1–6+, erect, slender; bark proximally grayish, distally reddish-brown, ± exfoliating in strips near base, decurrently ridged; short-shoots absent; unarmed; young stems reddish. Leaves winter-persistent, deciduous, cauline, alternate; stipules persistent, linear to awl-shaped, margins serrate; petiole present; blade bright green adaxially, ovate or ovatelanceolate to cordate, 2–9 cm, membranous, margins flat, shallowly lobed and coarsely serrate or doubly serrate, abaxial surface subsericeous to strigose, adaxial sparsely strigose to subsericeous. Inflorescences terminal, 2–10-flowered, subumbellate corymbs; bracts absent; bracteoles present. Pedicels present. Flowers appearing as leaves expand, odorless, 2.5–4 mm diam.; epicalyx bractlets 0; hypanthium flat, 1–3 mm diam., glabrous or glabrate; sepals 5, spreading to reflexed, elliptic to obovate or lanceolate, margins serrate (incised above middle); petals usually 0, rarely 1 or 2, white, oblanceolate; stamens 50–100+, equal to sepals (inner often shorter); torus inconspicuous; carpels 2–6, densely strigose, styles subapical, elongate, stigmas minute; ovule 1. Fruits aggregated achenes, 2–6, eccentrically ovoid, 3–4 mm, densely strigose; hypanthium persistent; sepals persistent, orientation in fruit unknown.
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Species 2 (2 in the flora).