What kind of plant is Ranunculus sceleratus? An introduction to its characteristics and value

Ranunculus sceleratus (cursed buttercup) is an annual or biennial herbaceous plant in the genus Ranunculus of the family Ranunculaceae. It is distributed across most regions of China and is commonly found in moist environments such as stream banks, alongside ditches, at the edges of rice paddies, and in low-lying wetlands. The plant has erect stems, mostly several tens of cm in height, with long-stalked basal leaves whose blades are nearly kidney-shaped and usually deeply divided into three lobes, making its overall form rather similar to that of the closely related buttercup.

In terms of identifying features, the flowers of Ranunculus sceleratus are relatively small and yellow, mostly opening at the turn of spring and summer, and the fruit is an aggregate of achenes that sit densely on an elongated receptacle once ripe. Compared with the buttercup, Ranunculus sceleratus is usually shorter and smaller, with stems and leaves that are nearly smooth and hairless, and given its preference for wet habitats, it is not difficult to distinguish on close inspection.

It should be noted that the entire plant of Ranunculus sceleratus is toxic and contains irritating compounds; contact of the sap with the skin may cause redness, swelling and inflammation, and ingestion can easily irritate the mouth and gastrointestinal tract. Therefore, do not pick or eat it casually in the wild, and take protective measures when digging or cultivating it, while also preventing livestock from grazing on it to avoid losses.

In terms of uses, the whole plant of Ranunculus sceleratus is used as medicine, traditionally mostly externally, for conditions such as sores, abscesses and swellings; whether it is taken internally must strictly follow professional guidance and must not be attempted on one's own. For growers, it is often cleared as a weed when it appears in field margins and wetlands, but in wetland ecosystems it is also a common indicator plant of wet and aquatic conditions; understanding its habits and toxicity helps with correct identification and safe use.