Selaginella uncinata, the blue spikemoss, peacock fern, peacock spikemoss, rainbow moss, or spring blue spikemoss, is a species of plant in the Selaginellaceae family.
It is widely cultivated outdoors along the Gulf Coast of the United States and in greenhouses and nurseries. It is a native of southern China and is closely allied to Selaginella delicatula (Desvaux ex Poiret) Alston, also in part from China.