Scarlet pimpernel or Burnet saxifrage

Overview

• Common names: solid-stem burnet-saxifrage, burnet saxifrage, lesser saxifrage
• Scientific names: Pimpinella saxifraga ssp. saxifraga, P. saxifraga ssp. nigra

• Invades grasslands and woodlands; prefers dry, well-drained, calcareous soils (particularly chalk and limestone downs). It also grows well in rich soils and occasionally acidic sands.
• Rapidly spreads by human activity and vehicles, especially along roadsides.
• Plants have very high seed production.
• This species is sold as an ornamental.

Classification in Wisconsin: Restricted

Species Assessment Groups (SAG) were assembled to recommend a legal classification for each species considered for NR 40. The recommendation for burnet-saxifrage was based upon this literature review [PDF] developed by the department.

Identification

Leaves & stems: Bipinnate leaves with numerous, oppositely arranged leaflets.

Flowers: White umbel flowers resemble Queen Anne's lace. Flowers are perfect (containing both male and female reproductive parts) and self-fertile.

Roots: Dark taproot, semi-woody.

Control

• Hand-pull plants, being sure to remove the taproot.
• Mow plants before or during flower to prevent seed-set. Monitor for re-sprouts.

• Apply glyphosate according to label rates.

Photos

View burnet-saxifrage pictures in our photo gallery.

Resources

• Robert W. Freckmann Herbarium. 2010. Plants of Wisconsin. University of Wisconsin-Stevens Point, WI 54481 USA.
• Huja, A., et al. 2009. “Tolerance of a perennial herb, Pimpinella saxifraga, to simulated flower herbivory and grazing: immediate repair of injury or postponed reproduction?” Plant Ecology 201(2): 599-609.
• Lukes, Roy. Retired director of the Ridges Sanctuary. Personal communications.

• Wisconsin State Herbarium [exit DNR]