....... The Comparative utility enables users to explore the conservation of known and predicted miRNAs among plant species in integrative views. Under the miRNA tab, the user may select miRNAs of interest and submit for their availability among plant species and a matrix view of selected miRNAs and plants will be returned. The Sequence tab allows users to explore the alignment and evolution of either mature or precursor miRNA sequences from miRBase, our prediction results, and user-supplied sequences of a family across plant species.