Linanthus grandiflorus, commonly known as mountain phlox, is an annual wildflower native to California and parts of the southwestern United States, where it brightens dry hillsides, open woodlands, and coastal scrub with its delicate blooms. Typically growing 4 to 12 inches tall, the plant has slender, branching stems and finely divided, threadlike leaves that give it a soft, airy appearance. In spring, Linanthus grandiflorus produces clusters of showy, funnel-shaped flowers that range in color from white to pale pink or lavender, often with a yellow throat, creating a striking contrast against the sparse, dry landscape. The blossoms open in the evening and emit a light, sweet fragrance that attracts nocturnal pollinators such as moths. Adapted to arid conditions, the species thrives in sandy or gravelly soils and full sun, completing its life cycle quickly before the summer heat sets in. As a member of the phlox family (Polemoniaceae), it contributes to the rich floral diversity of California’s native ecosystems. Linanthus grandiflorus is also appreciated in wildflower gardens and restoration projects for its drought tolerance, charm, and ecological value in supporting native pollinators while adding a touch of ethereal beauty to dry, open landscapes.