Sulphur Cinquefoil

Potentilla recta

Summary 5

Potentilla recta, the sulphur cinquefoil or rough-fruited cinquefoil, is a species of cinquefoil. It is native to Eurasia but it is present in North America as an introduced species, ranging through almost the entire continent except the northernmost part of Canada and Alaska.

How to recognize it? 6

Palmate leaves resemble hands (divided into 5-7 hairy, toothed leaflets). 5 pale yellow, heart-shaped petals. Long, stiff hairs at right angles from the stem (unlike the natives whose hairs lie flat against the stem). Grow to 0.8 m (2.6 ft).

Native lookalike: Native cinquefoil has a silver or green color on the underside of the leaf, while invasive has a green underside.

Observations in Banff National Park 7

When are they blooming in Banff National Park? Mid-June at the earliest. Full bloom usually during the first half of August. Bloom/seeding continuing on until mid-September.

Sources and Credits

  1. (c) Michael Ellis, some rights reserved (CC BY), uploaded by Michael Ellis
  2. (c) Radio Tonreg, some rights reserved (CC BY),
  3. (c) Randy A. Nonenmacher, some rights reserved (CC BY-SA),
  4. Johann Georg Sturm (Painter: Jacob Sturm), no known copyright restrictions (public domain),
  5. Adapted by bioblitzbanff from a work by (c) Wikipedia, some rights reserved (CC BY-SA),
  6. (c) bioblitzbanff, some rights reserved (CC BY-SA)
  7. (c) metallyza, some rights reserved (CC BY-SA)

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