Ranunculaceae - buttercup family

Gerald A. Mulligan
Research Scientist and Research Institute Director (retired) and presently Honorary Research Associate, Agriculture and Agri-Food Canada,
Ottawa, Ontario K1A 0C6, Canada

Awarded the George Lawson Medal by the Canadian Botanical Association in 2006.
Awarded the Faculty of Macdonald, McGill University, Most Distinguished Alumni Award on October 18, 2014.
Read his biography "The Real Weed Man" available in print and ebook.

Ranunculus acris L., tall buttercup, renoncule âcre
Perennial, reproducing by seeds; mostly allogamous; stems 1.5 to 3 feet (45 cm. to 9 dm.) high; flowers yellow; throughout, but most abundant in east; pastures, hayfields, roadsides and waste places; introduced from Europe. Usually not grazed by livestock, but if eaten poisoning can occur.

Ranunculus repens L., creeping buttercup, renoncule rampante
Perennial, with creeping shoots; frequently prostrate; flowers yellow; throughout, except the mid-west; most common along the east and west coasts; pastures, lawns, and waste places; introduced from Europe.

Click on a photo to view an enlarged image.
Weed Name Photo Weed Name Photo
tall buttercup, renoncule âcre tall buttercup, renoncule âcre
(F&M)
tall buttercup, renoncule âcre tall buttercup, renoncule âcre      
tall buttercup, renoncule âcre
(seedling)
creeping buttercup, renoncule rampante
creeping buttercup, renoncule rampante
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