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English: floral diagram of Ranunculus acris; after EICHLER, August Wilhelm, 1878. Blüthendiagramme, zweiter Theil: Enthaltend die apetalen und choripetalen Dicotylen [online].
Ranunculus acris is a herbaceous perennial plant that grows to a height of 30 to 100 cm, with ungrooved flowing stems bearing glossy yellow flowers about 25 mm across. There are five overlapping petals borne above five green sepals held upwards against the petals, that turn yellow as the flower matures.
The familiar and widespread buttercup of gardens throughout Northern Europe (and introduced elsewhere) is the creeping buttercup Ranunculus repens, which has extremely tough and tenacious roots. Two other species are also widespread, the bulbous buttercup Ranunculus bulbosus and the much taller meadow buttercup Ranunculus acris.
Ranunculus is a genus of about 1,700 species of plants in the Ranunculaceae. [1] Members of the genus include the buttercups , spearworts and water crowfoots . Contents
Ranunculaceae (/ r ə n ʌ ŋ k j uː ˈ l eɪ s i ˌ aɪ,-s iː ˌ iː /, buttercup or crowfoot family; Latin rānunculus "little frog", from rāna "frog") is a family of over 2,000 known species of flowering plants in 43 genera, [2] distributed worldwide.
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In 2018 the first confirmed adults were reared from stem-mines of meadow buttercup (Ranunculus acris). This is a rare example of 'organoxeny', where a phytophagous insect occurs on a different part of a plant from where it can normally be found . [18]
[6] [7] Although the presence of a corm distinguishes Ranunculus bulbosus from some other species of buttercup such as Ranunculus acris, the species also has distinctive reflexed sepals. Other names for the bulbous buttercup are "Goldcup" because of the colour and shape of the leaves, and "Frogs-foot" from their form. [8]