Rockloving cinquefoil

Potentilla rupincola Osterhout, Bull. Torrey Bot. Club 26: 256. 1899

Leaflets ± green, teeth 2–5 per side, abaxial surfaces sparsely to moderately long-hairy at least on veins, not or sparsely cottony, adaxial glabrous or sparsely long-hairy and/or cottony. Flowers: epicalyx bractlets and sepals mostly glabrate or glabrous except proximally; anthers 0.5–0.6(–0.7) mm.

Flowering summer. Granitic outcrops or thin, gravelly soil, montane conifer woodlands; of conservation concern; 2100–3300 m; Colo.

Besides being bright green (rather than grayish), var. rupincola plants are generally less robust and somewhat shorter than plants of var. effusa, which also tends to be more upright. The variety is known only from the Rocky Mountains of north-central Colorado.