Hypericum monogynum

Hypericum monogynum is known as Chinese St John's wort. It belongs to the Hypericaceae family. Its native range covers central and southern China and Taiwan. This woody shrub grows in scrub, gorges, and roadside thickets. It also grows on slopes in dry sites. In Sichuan, it reaches heights of 4,920 feet [1,500 metres]. Gardeners grow it for its flowers in many countries.

The shrub has a bushy shape with spreading branches. Garden plants reach about 1.6–3.3 feet [0.5–1 metre] in height and width. Some accounts give heights up to 4.3 feet [1.3 metres]. The RHS describes plants around 2.6 feet [0.8 metres] tall. They reach their full size in two to five years. Narrow leaves stay on the plant for much of the year. Sources describe the foliage as evergreen or partly evergreen. The species varies in form across its range.

Golden flowers open in small groups from summer through autumn. Each flower measures about 0.2 feet [0.06 metres] across. Showy gold stamens stand out in the flower's centre. Insects pollinate the flowers. The long bloom season gives this small shrub its garden value. The RHS lists it for flower beds and borders. It also suits courtyards and beds beside walls. Its modest size allows use in small garden spaces.

Choose a warm site with full sun and shelter. The RHS favours moist soil that drains well. It lists clay, loam, sand, and chalk as suitable soils. The plant accepts acid, neutral, and alkaline conditions. Its UK hardiness rating is H3, suited to mild or coastal areas. Plants For A Future lists USDA zones 8–11. Summer cuttings from partly firm shoots provide a way to grow more plants. The RHS reports few pest problems. Rust can occur, while honey fungus is a rare risk.

No edible uses are recorded in the supplied sources. The RHS warns that people and pets must not eat the fruit. It also advises gloves and other protection when handling plants. Other sources report no known hazards, so their safety accounts differ. Traditional medicine records include use for diarrhoea and vomiting. They also describe leaf and twig paste for bites and stings. These records describe past uses, not proof of safety or benefit.