Oat Hill Mine Trail

California lacefern (Aspidotis californica) grows in rock cracks and crevices in many types of habitats. It has leaves that are thin and dissected into many triangular leaflets which are subdivided into small segments with curled teeth. The leaf segments have sori containing sporangia, with the edges of the leaves rolled under to create a false indusium over the sori that holds the spores.