Potentilla biflora

D. F. K. Schlechtendal

Ges. Naturf. Freunde Berlin Mag. Neuesten Entdeck. Gesammten Naturk. 7: 297. 1816.

Common names: Two-flower cinquefoil
Illustrated
Treatment appears in FNA Volume 9. Treatment on page 131.

Basal leaves: petiole 1–4 cm, long hairs absent or sparse, 1.5–2 mm, crisped hairs absent or sparse; leaflet lobes linear, 10–20 × 1–2 mm, surfaces with long hairs sparse or absent. Flowers: epicalyx bractlets oblong, ovate, or lanceolate, 2.5–4 × 0.4–1.3 mm; sepals 3.5–5 mm, apex acute to apiculate; petals 6–10 × 4–10 mm; filaments 2.8–4 mm, anthers 0.6 mm; carpels 15–25. Achenes 1.5–2 mm. 2n = 14.


Phenology: Flowering summer.
Habitat: Dryas fellfields, gravel terraces, well-drained soil, often with seasonal seepage, on calcareous substrates
Elevation: 0–2000 m

Distribution

V9 187-distribution-map.jpg

B.C., N.W.T., Nunavut, Yukon, Alaska, Asia.

Discussion

In North America, Potentilla biflora is mostly Beringian, barely reaching northern British Columbia and western Northwest Territories, with one locality in Nunavut (southern Victoria Island). The amphi-Beringian range is strongly isolated from other Asian populations, the closest being in the Altai Mountains of south-central Siberia. Two varieties are accepted in China (Li C. L. et al. 2003c), with North American plants falling in var. biflora.

Selected References

None.

Lower Taxa

None.
... more about "Potentilla biflora"
Reidar Elven +, David F. Murray +  and Barbara Ertter +
D. F. K. Schlechtendal +
Biflorae +
Two-flower cinquefoil +
B.C. +, N.W.T. +, Nunavut +, Yukon +, Alaska +  and Asia. +
0–2000 m +
Dryas fellfields, gravel terraces, well-drained soil, often with seasonal seepage, on calcareous substrates +
Flowering summer. +
Ges. Naturf. Freunde Berlin Mag. Neuesten Entdeck. Gesammten Naturk. +
Illustrated +
Potentilla ser. +  and Potentilla subg. Micropogon +
Potentilla biflora +
Potentilla sect. Biflorae +
species +