Allium obliquum, commonly known as lop-sided onion or twisted-leaf onion, is a perennial herb native to a wide range of habitats including meadows, rocky slopes, and riverbanks from Romania to Mongolia. It can grow up to 40 inches tall and is characterized by its unique spherical umbels of star-shaped, yellow flowers that bloom in early to mid-summer. The leaves are flat and typically shorter than the scape, which is round in cross-section and can give the plant a somewhat twisted appearance. The twisted-leaf onion is particularly noted for its ornamental value, with its distinctive flower shape and color providing visual interest in garden settings.

In cultivation, Allium obliquum is appreciated for its ease of maintenance and its ability to thrive in a variety of garden conditions. It is often used in borders, rock gardens, and as a part of naturalistic plantings. This species prefers well-drained soils and full sun, but can tolerate light shade. It is generally free from serious pests and diseases, making it a resilient choice for gardeners. While it is not aggressive, it can naturalize by self-seeding under optimal conditions. Gardeners should be aware that all parts of the plant have a strong onion scent when crushed.CC BY-SA 4.0