13. Ivesia lycopodioides A. Gray, Proc. Amer. Acad. Arts. 6: 530. 1865.
Potentilla lycopodioides (A. Gray) Baillon ex J. T. Howell
Plants green, usually rosetted, sometimes ± tufted; taproot fusiform, fleshy. Stems decumbent to erect, 0.3–3 dm. Basal leaves tightly to loosely cylindric, 1–15 cm; sheathing base glabrous abaxially; petiole 0.5–4 cm, hairs 0.2–1 mm; leaflets 10–35 per side, 1–8 mm, glabrous or short-hirsute, minutely glandular, lobes (2–)4–8(–10), linear to obovate or ± orbiculate, apex sometimes setose. Cauline leaves 0–2(–3), not paired. Inflorescences 3–20(–25)-flowered, (0.5–)1–2.5(–3.5) cm diam.; glomerules usually 1. Pedicels (0.5–)1–7(–11) mm. Flowers 6–12 mm diam.; epicalyx bractlets oblong to oval, 0.8–2.5(–3) mm; hypanthium shallowly cupulate, 1–2 × 2.5–5 mm; sepals (1.8–)2–4(–4.5) mm, obtuse to acute; petals golden yellow, obovate, 2–5 mm; stamens 5, filaments 0.8–2 mm, anthers yellow, 0.6–0.8 mm; carpels (5–)8–15(–18), styles 1–3 mm. Achenes greenish tan to light brown, 1.2–1.5 mm.
Varieties 3 (3 in the flora): w United States.
The three varieties of Ivesia lycopodioides are for the most part readily distinguished, though intergradation is known. The high-elevation var. lycopodioides extends farthest north; var. scandularis is the only variety in the White Mountains. Variety megalopetala is found mostly at somewhat lower (subalpine) elevations and generally has a more southern range.
