Spilanthes acmella (L.) L.
English : Toothache plant, Pellitary, Hindi : Akarkara, Sanskrit : Akallaka, Sarahattika, Bengali: Akarakara, Gujrati: Akkalkaro, Akkalgaro, Kannada: Akkallakara, Akallakara, Akalakarabha, Malayalam: Akikaruka, Akravu, Oriya: Akarakara, Punjabi: Akarakarabh, Akarakara, Telugu: Akkalakarra, Tamil : Vana-mugali, Marathi : Acharbomdi, Akalkarra, Pipu-labo, Assamese: Kulekhara,
It is an erect, branched, annual herb which reaches a height of 15 to 60 cm. It is found in Southeast Asia and China. The plant is sprawling and much-branched, with olive-green to purple-flushed, ovate leaves. Leaves are opposite, smooth or nearly so, ovate or ovate-lanceolate, and 1.5 to 3 cm long, with pointed tip and wedge-shaped base, and with toothed or wavy margins. Conical heads occur singly at the ends of long stalks, and are about 1 cm in length. Flower heads are yellow with brown patch in centre. Achenes are flattened, oblong, dark-brown and enclosed separately in scales.
It contains spilanthol, acmellonate, stigmasterol, stigmasteryl-3-o-b-d-glucopyranoside and triterpenes.
Rasa : Katu, Guna : Tikshna, Ruksha, Virya : Ushna, Vipaka : Katu.
Danta Krimi, Danta roga, Danta sula, Dantasaushirya, Kasa, Sotha, Svasa, Udararoga, Sullaroga, Krimi Roga, Vajikarana, Amavata.
Flower heads are used for the treatment of wounds, toothache, dental cavities, looseness of teeth, pyorrhea, painful canker sores, ringworm infections, neurasthenia, insanity, flaccidity of tongue and other mouth related troubles. It is used for the improvements in ejaculation frequency and decreasing the post-ejaculatory interval. It is also used for the treatment of rheumatism and inflammation, tongue paralysis, stomatitis (inflamed and sore mouth), treatment for fever, sore throat, and even gum infections.