Ontario Weeds: Celery-leaved buttercup
Excerpt from Publication 505, Ontario Weeds, Order this publication
Table of Contents
- Other Names
- General Description
- Stems and Roots
- Flowers and Fruit
- Similar Species
- Related Links
Name: Celery-leaved buttercup, Ranunculus
Other Names: renoncule scélérate, Cursed crowfoot
Family: Buttercup Family (Ranunculaceae)
General Description: Annual or short-lived perennial, reproducing only by seed.
Celery-leaved buttercup. A. Plant. B. One flower with many stamens and pistils. C. One seed head with many seeds.
Stems & Roots: Stems erect, 5-60cm
(2-24in.) high, stout, hollow, smooth, branched above, often somewhat
succulent; basal and lower stem leaves succulent, long-stalked,
somewhat kidney-shaped in outline and distinctly 3-lobed to nearly
3-parted, the segments again cleft or lobed or with rounded teeth;
upper leaves much smaller, commonly either having 3 linear-oblong
segments with entire or only slightly toothed divisions, or simple.
Flowers & Fruit: Flowers numerous but borne singly on long stalks at the ends of branches, the whole inflorescence being either rounded or elongated; sepals 2-5mm (1/12-1/5in.) long, with soft hairs; petals pale yellow, 1-5mm (1/25-1/5in.) long; stamens many in a ring surrounding the many tiny pistils; seeds (achenes) individually very small, 0.8-1.4mm (1/30-1/20in.) long, but very numerous in a short, cylindric cluster. Flowers from May to September.
Habitat: Celery-leaved buttercup is found in southern and western Ontario in swamps, ditches, roadsides, pastures, fields, mudflats and the edges of ponds and lakes.
Similar Species: It is distinguished by its celery-like, 3-lobed lower leaves having long petioles and rounded teeth, its small, yellow flowers and its elongated cluster of seeds.
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