Hypericum triquetrifolium, commonly known as Curled-leaved St. John’s-wort, is a perennial herb native to rocky slopes, scrub, and open woodlands within the Mediterranean Basin. It is characterized by its square stems and opposite leaves with distinctive curled margins, which give the plant its common name. Hypericum triquetrifolium typically grows to a height of 10-30 centimeters and produces bright yellow flowers with numerous stamens that bloom in the summer months. The flowers are showy and attract pollinators such as bees and butterflies.

Curled-leaved St. John’s-wort is valued for its ornamental qualities, including its vibrant flowers and unique foliage. It is used in rock gardens, as a ground cover, or in borders where its low-growing habit and drought tolerance are advantageous. This plant prefers well-drained soils and thrives in full sun to partial shade. It is relatively low maintenance and can tolerate periods of drought once established. While it is known for its medicinal properties, particularly in the treatment of mild to moderate depression, care should be taken as it can interact with various medications. There are no significant disease problems, but it can be susceptible to rust.CC BY-SA 4.0