Ficaria verna, commonly known as lesser celandine or pilewort, is a low-growing, hairless perennial flowering plant in the buttercup family Ranunculaceae. It has fleshy dark green, heart-shaped leaves and distinctive flowers with bright yellow, glossy petals. Native to Europe and Western Asia, it is now introduced in North America, where it is known by the common name fig buttercup and considered an invasive species. The plant is poisonous if ingested raw and potentially fatal to grazing animals and livestock such as horses, cattle, and sheep. For these reasons, several US states have banned the plant or listed it as a noxious weed. It prefers bare, damp ground and is considered by horticulturalists in the United Kingdom as a persistent garden weed; nevertheless, many specialist plantsmen, nursery owners and discerning gardeners in the UK and Europe collect selected cultivars of the plant, including bronze-leaved and double-flowered ones. Emerging in late winter with flowers appearing late February through May in the UK, its appearance across the landscape is regarded by many as a harbinger of spring.
Ranunculus is a large genus of about 1700 to more than 1800 species of flowering plants in the family Ranunculaceae. Members of the genus are known as buttercups, spearworts and water crowfoots.
Ranunculus repens, the creeping buttercup, is a flowering plant in the buttercup family Ranunculaceae, native to Europe, Asia and northwestern Africa. It is also called creeping crowfoot and sitfast.
Caltha palustris, known as marsh-marigold and kingcup, is a small to medium sized perennial herbaceous plant of the buttercup family, native to marshes, fens, ditches and wet woodland in temperate regions of the Northern Hemisphere. It flowers between April and August, dependent on altitude and latitude, but occasional flowers may occur at other times.
Ranunculus bulbosus, commonly known as bulbous buttercup or St. Anthony's turnip, is a perennial flowering plant in the buttercup family Ranunculaceae. It has bright yellow flowers, and deeply divided, three-lobed long-petioled basal leaves.
Ranunculus acris is a species of flowering plant in the family Ranunculaceae, and is one of the more common buttercups across Europe and temperate Eurasia. Common names include meadow buttercup, tall buttercup, common buttercup and giant buttercup.
Anemone hepatica, the common hepatica, liverwort, liverleaf, kidneywort, or pennywort, is a species of flowering plant in the buttercup family Ranunculaceae, native to woodland in temperate regions of the Northern Hemisphere. This herbaceous perennial grows from a rhizome.
Ranunculus flammula, the lesser spearwort, greater creeping spearwort or banewort, is a species of perennial herbaceous plants in the genus Ranunculus (buttercup), growing in damp places throughout the Boreal Kingdom. It flowers June/July. Ranunculus flammula is poisonous. It is very closely related to R. reptans, which is distinguished by prostrate and more slender stems, narrower leaves and smaller flowers and is sometimes included within R. flammula sensu lato as a variety.
Ranunculus occidentalis, the western buttercup, is a species of buttercup found in the western regions of North America. Its distribution extends from Alaska through British Columbia and Alberta to central California. The flower can be seen in open meadows, forests, and other generally flat areas up to an elevation of 2,200 metres (7,200 ft).
Halerpestes cymbalaria is a species of buttercup known by the common names alkali buttercup and seaside buttercup. It is native to much of Eurasia and parts of North and South America, where it grows in many types of habitat, especially in moist to wet areas such as marshes, bogs, and moist spring meadows. It is a perennial herb producing several stems a few centimeters to nearly 40 centimeters long. Some are prostrate against the ground and are stolons which root in moist substrate, and some are erect. The leaves are variable in shape, the basal ones with notched or slightly divided leaf blades borne on long petioles, and any upper leaves much reduced in size. The inflorescence bears one or more flowers on erect stalks. The flower has five to eight pale yellow petals, each under a centimeter long. The protruding receptacle at the center of the flower becomes a cylindrical cluster of fruits, each of which is an achene.
Ranunculus eschscholtzii is a species of buttercup flower known by the common name Eschscholtz's buttercup.
Ranunculus muricatus is a species of buttercup known by the common names rough-fruited buttercup and spinyfruit buttercup. It is native to Europe, but it can be found in many other places in the world, including parts of Africa, Australia, and the western and eastern United States, as an introduced species and agricultural and roadside weed. It grows in wet habitats, such as irrigation ditches. It is an annual or sometimes biennial herb producing a mostly hairless stem up to half a meter long which may grow erect or decumbent along the ground. The leaves have blades a few centimetres in length which are deeply divided into three lobes or split into three leaflets. They are hairless to hairy in texture, and are borne at the tips of long petioles. The flower has five shiny yellow petals under 1 centimetre (0.4 in) long around a lobed central receptacle studded with many stamens and pistils. The fruit is a spiny achene borne in a spherical cluster of 10 to 20.
Ranunculus auricomus, known as goldilocks buttercup or Greenland buttercup, is a perennial species of buttercup native to Eurasia. It is a calcicole typically found in moist woods and at the margins of woods. It is apomictic, and several hundred agamospecies have been recognised.
Ranunculus pedatifidus is a species of buttercup known by the common names surefoot buttercup, northern buttercup, and birdfoot buttercup. It has a circumpolar distribution, occurring throughout the northern latitudes of the Northern Hemisphere. There are two varieties, var. pedatifidus occurring mostly in Asia and var. affinis mostly native to North America.
Ranunculus abortivus is a species of flowering plant in the buttercup family, Ranunculaceae. Its common names include littleleaf buttercup, small-flower crowfoot, small-flowered buttercup, and kidneyleaf buttercup. It is widespread across much of North America, found in all ten Canadian provinces as well as Yukon and the Northwest Territories, and most of the United States, except Hawaii, Oregon, California, and parts of the Southwest.
Ranunculus trichophyllus, the threadleaf crowfoot, or thread-leaved water-crowfoot, is a plant species in the genus Ranunculus, native to Europe, Asia and North America.
Ranunculus cortusifolius, also known as the Azores buttercup or Canary buttercup, is a plant species in the genus Ranunculus, family Ranunculaceae, the buttercup or crowfoot family. It grows on moister sites throughout the Azores, Madeira and Canary Islands but is widely cultivated elsewhere as an ornamental. There are reports of it having become naturalized in parts of California.
Ranunculus hispidus is a species of perennial flowering plant in the buttercup family, Ranunculaceae. It is commonly known as bristly buttercup or hispid buttercup. It is a small plant native to central and eastern North America that grows to a height up to 30 cm (1 ft) and has 5-petaled yellow flowers.
Ranunculus arcticus, the birdfoot buttercup, is a species of buttercup in the family Ranunculaceae. It has a circumpolar distribution in Northern Europe, Northern Asia and North America.
