Potentilla effusa var. rupincola

(Osterhout) Th. Wolf

Biblioth. Bot. 16 (Heft 71): 199. 1908.

Common names: Rockloving cinquefoil
Conservation concernEndemic
Basionym: Potentilla rupincola Osterhout Bull. Torrey Bot. Club 26: 256. 1899
Treatment appears in FNA Volume 9. Treatment on page 164. Mentioned on page 163.

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.


Phenology: Flowering summer.
Habitat: Granitic outcrops or thin, gravelly soil, montane conifer woodlands
Elevation: 2100–3300 m

Discussion

Of conservation concern.

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.

Selected References

None.

Lower Taxa

None.
Barbara Ertter +  and James L. Reveal +
(Osterhout) Th. Wolf +
Potentilla rupincola +
Rockloving cinquefoil +
2100–3300 m +
Granitic outcrops or thin, gravelly soil, montane conifer woodlands +
Flowering summer. +
Biblioth. Bot. +
Conservation concern +  and Endemic +
Potentilla hippiana subsp. effusa +  and P. hippiana var. effusa +
Potentilla effusa var. rupincola +
Potentilla effusa +
variety +