Burr Buttercup

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Bur Buttercup Ranunculus testiculatus. Bur buttercup is a county declared weed in Converse county in Wyoming. Photo by Richard Old, XID Services, Inc., Bugwood.org. Bur Buttercup is not listed on the regulated or unregulated invasive plants in BC. You can see a list of invasive BC plant species here. Two more pictures taken by Rick Howie in 2017. This “stand” of Bur Buttercups is on East Shuswap Road. The flowers of Bur Buttercup are probably cross-pollinated by small bees and flies. Aphids, sawfly larvae, and other insects are known to feed on buttercups, but these are mostly wetland and woodland species. The seedheads may provide a source of food to Ring-Necked Pheasants, Wild.

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bur

[ber]
a form of drill used for creating openings in bone or similar hard material. Also spelled burr.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

bur

(ber), This spelling is preferred to burr.
2. In ophthalmology, a device used to remove rust rings embedded in the cornea.
Farlex Partner Medical Dictionary © Farlex 2012

burr

A drill bit used to cut hard tissues (e.g., enamel, bone) in dentistry or orthopaedics.Burr Buttercup
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.

burr

A drill bit used to cut hard tissues–enamel, bone in dentistry or orthopaedics
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.

bur

(Burr Buttercupbŭr)
A rotary cutting instrument, used in dentistry, consisting of a small metal shaft and a head designed in various shapes; used at various rotational velocities to excavate decay, shape cavity forms, and reduce tooth structure.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

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Ranunculus testiculatus

Bur buttercup (Bonnie Million, National Park Service, Bugwood.org)

Bur buttercup lateral habit (USDA Forest Service, Wikimedia Commons)

Burr

Bur buttercup fruit (Curtis Clark, Wikimedia Commons)

Buttercup

Description

  • low-growing plant with light green, antler-looking leaves covered with white hairs
  • small bright yellow flowers are singly produced on the tips of leafless stalks which grow taller than the leaves
  • five petal flowers are succeeded by oval-shaped, spiny burs; each bur produces 5 to 80 seeds
  • summer annual with germination in early spring when temperatures reach 41°F
Burr Buttercup

Location

  • commonly grows in planting beds and lawn areas

Burr Buttercup

Life Cycle

Burr Buttercup Picture

  • flowers are produced within 3 weeks of germination followed by burs
  • plant foliage dries, turns brown and becomes brittle by early summer

IPM Recommendations

Burr Buttercup Picture

  • Hand-pull plants in planting beds prior to seed maturation.
  • Shallow tillage or hoeing will control young plants in planting beds.
  • Apply a mulch layer 3 inches deep on planting beds to reduce seed germination.
  • Apply an appropriate post-emergent broadleaf herbicide directly to target weeds.