Compilation
Chrysosplenium iowense

Stolons white, 0.3–1.2 mm diam., sparsely villous, hairs white or reddish brown. Flowering stems erect, branching in distal 1/6–1/3, 3–15 cm, glabrous. Leaves alternate, membranous. Stolon leaves: petiole 7–43 mm, sparsely villous, hairs white or reddish brown; blade depressed-ovate to reniform, 6–13 × 7–18 mm, base cordate, margins 5–9-crenate, not purple-spotted, glabrous or sparsely ciliate, hairs white, surfaces glabrous or sparsely villous, especially near petiole, hairs usually white, sometimes purplish. Cauline leaves 1–3; petiole 3–23(–26) mm, glabrous or villous proximally, hairs purplish; blade depressed-ovate to reniform or flabellate, 6–17 × 9–23 mm, base cordate or, rarely, cuneate, margins 5–9-crenate, glabrous, surfaces glabrous abaxially and adaxially or, rarely, villous near petiole, hairs purplish. Inflorescences terminal, 3–12-flowered, compact cymes; bracts greenish yellow, not purple-spotted, foliaceous, ovate to depressed-ovate or flabellate, 2–10 × 2–11 mm, margins 3–7-crenate. Pedicels absent or 0.1–1.2 mm. Flowers: hypanthium yellow or greenish yellow, not purple-spotted, campanulate, 1.2–2.3 × 1.5–3 mm, glabrous; sepals spreading, yellow or greenish yellow, not purple-spotted, ovate to broadly ovate, 0.9–1.5 × 1.1–2 mm, apex obtuse to rounded; nectary disc inconspicuous, yellow, unlobed; stamens 2–8, 0.6–0.7 mm; anthers yellow, 0.1–0.2 × 0.1–0.2 mm; styles 0.3–0.4 mm. Seeds (8–)20–30(–56), reddish brown, ovoid to ellipsoid, (0.5–)0.6–0.9 mm, glabrous. 2n = ca. 120.