Allium serra, commonly known as Jeweled Onion or Serrated Onion, is a perennial herb native to the chaparral, coastal sage scrub, and foothill woodlands of central and northern California, from Merced County to Humboldt County. It typically grows to a height of 10-15 inches (25-38 cm). The plant produces a small bulb and a long stem that supports a tightly bunched umbel of bright pink, thimble or bell-shaped flowers that are quite showy during its blooming period in late spring to early summer. The foliage is narrow and grass-like, with a distinctive serrated edge, which is the origin of its common name.

Jeweled Onion is valued for its ornamental flowers and its ability to thrive in challenging soil conditions, including serpentine soils known for their low fertility and high levels of heavy metals. It is often used in rock gardens, native plant gardens, and as a border plant in dry garden landscapes. This species prefers full sun to light shade and requires well-drained soils, tolerating drought once established. While it is not commonly affected by diseases, overwatering can cause bulb rot. Allium serra is also appreciated for its low maintenance requirements and its attractiveness to pollinators such as bees and butterflies.CC BY-SA 4.0