Aliciella sedifolia (formerly Gilia sedifolia) is a rare species of flowering plant in the phlox family known by the common name stonecrop gilia. It is endemic to Colorado in the United States, where it is limited to a small area in the San Juan Mountains. This plant is limited to the alpine climates of the high San Juan Mountains. It grows on white volcanic ash and sandstone talus. The local elevation is between 11,800 and 13,400 feet. Alpine avens (Geum rossii) is a dominant plant in the area, but the gilia only occurs in bare patches amidst the plant cover.