Asplenium chihuahuense
Asplenium chihuahuense is a rare fern endemic to the states of Chihuahua and Durango , Mexico . 
<triplet> Chihuahua <subj> Mexico <obj> country <triplet> Durango <subj> Mexico <obj> country <triplet> Mexico <subj> Chihuahua <obj> contains administrative territorial entity <subj> Durango <obj> contains administrative territorial entity