Brodiaea filifolia
It is endemic to southern California , mostly in the region around the junction of Orange , Riverside , and San Diego Counties . 
<triplet> California <subj> Orange <obj> contains administrative territorial entity <subj> Riverside <obj> contains administrative territorial entity <subj> San Diego Counties <obj> contains administrative territorial entity <triplet> Orange <subj> California <obj> located in the administrative territorial entity <subj> San Diego Counties <obj> shares border with <triplet> Riverside <subj> California <obj> located in the administrative territorial entity <subj> San Diego Counties <obj> shares border with <triplet> San Diego Counties <subj> California <obj> located in the administrative territorial entity <subj> Orange <obj> shares border with <subj> Riverside <obj> shares border with