Swertia chirayita

Swertia chirayita belongs to the gentian family, Gentianaceae. Its native range runs from the Himalayas to Assam. Records include Bhutan, Nepal, and several parts of northern India. It grows on mountain slopes and in pastures. Its habitat reaches about 9,840 feet [3,000 metres] above sea level. Kew lists it as a plant of temperate climates. This fits its stated preference for cool summers in gardens.

This herb lives as an annual or biennial, according to Kew. Plants for a Future describes it as an annual. Its listed garden height is about 3.3 feet [1 metre]. The spread is about 1.6 feet [0.5 metres]. Flowers appear from September to October. Each flower has both male and female organs. The supplied sources give no details of flower colour or fruit. They also give no clear account of leaves or stems.

Choose moist, humus-rich soil for this plant. It can grow in sandy soil, loam, or clay. It accepts mildly acid, neutral, and mildly alkaline conditions. Plants for a Future lists both moist and wet soils. Suitable places include damp, lightly wooded ground and stream edges. A bog garden is another listed setting. It grows in full sun or partial shade. Woodland edges and dappled shade offer further planting options. These sites should still provide the damp soil it needs.

Plants for a Future lists USDA zones 6–9. It also reports survival at temperatures of at least 5°F [−15°C]. Sow seed in spring in a humus-rich growing medium. Keep sowing temperatures at or below 50°F [10°C]. Move seedlings into separate pots once large enough to handle. Plant them outside in early summer. The source does not list specific pests or diseases. It records no weed potential and no other material uses.

The plant has a history of use in Ayurvedic medicine. Its strong bitterness underlies its use as a digestive tonic. Traditional uses include nausea, indigestion, and bloating. It also forms part of the many-herb preparation mahasudarshana churna. The source discusses research into possible liver-protective effects. These medicinal reports do not establish it as a food plant. Plants for a Future records no known edible uses. It warns against exceeding recommended medicinal doses.