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Species of plant

Platycodon grandiflorus (from Ancient Greek πλατύς "wide" and κώδων "bell") is a species of herbaceous flowering perennial plant of the family Campanulaceae, and the only member of the genus Platycodon. It is native to East Asia (China, Korea, Japan, and the Russian Far East). It is commonly known as balloon flower (referring to the balloon shaped flower buds), Chinese bellflower, The five petals are fused together into a bell shape at the base, like its relatives, the campanulas.

Platycodon grandiflorus is a perennial plant which is commonly grown in mountains and fields. It is high and has thick roots, and white juice comes out when the stem is cut. Leaves are long, with narrow ends and teeth on the edges. Flowers bloom purple or white in July and August, with one or several running upward at the end of the circle. The flower crown is divided into five branches in the shape of an open bell. It lives throughout Japan, China, and eastern Siberia, including the Korean Peninsula.

This plant is hardy down to 40 °C ( 40 °F), and can be cultivated in USDA zones 3A to 9b. It dies down completely in winter, reappearing in late spring and flowering in summer. However, plants are widely available from nurseries in full flower from April onwards. Though the species has blue flowers, there are varieties with white, pink, and purple blooms. In Korea, white flowers are more common. This plant, together with its cultivars 'Apoyama group' and 'Mariesii', have gained the Royal Horticultural Society's Award of Garden Merit.

In Korea, the plant as well as its root are referred to as (도라지). The root, fresh or dried, is one of the most common vegetables. It is also one of the most frequent ingredients in bibimbap. Sometimes, rice is cooked with balloon flower root to make Preparation of the root always involves soaking and washing (usually rubbing it with coarse sea salt and rinsing it multiple times), which gets rid of the bitter taste. The root is also used to make desserts, such as Syrup made from the root, called (balloon flower root honey), can be used to make (balloon flower root tea). The root can be used to infuse liquor called , typically using distilled soju or other unflavored hard alcohol that has an ABV higher than 30% as a base. In addition, other ingredients include calcium, fiber, iron, minerals, proteins and vitamins.

The extracts and purified platycoside compounds (saponins) from the roots of Platycodon grandiflorum may exhibit neuroprotective, antimicrobial, anti inflammatory, anti cancer, anti allergy, improved insulin resistance, and cholesterol lowering properties. Evidence for these potential effects was mainly observed in vitro, with the exception of cholesterol lowering effects documented in vitro and in rats. The lack of efficacy and limited safety data in humans, however, necessitate further research.

is one of the most popular folk songs in both North and South Korea, and in China among the ethnic Koreans. It is also a well known song in Japan, by the name (トラジ). It is a folk song originated from Eunyul in Hwanghae Province. However, the currently sung version is classified as a Gyeonggi minyo (Gyeonggi Province folk song), as the rhythm and the melody have changed to acquire those characteristics.