Bonpland and myself from Acaguisotla, Nevado de Toluca and Cofre de Perote do not appear to differ specifically from the Pinus occidentalis of the West India Islands described by Schwartz.
Clethrionomys occidentalis occidentalis--a ten-mile gap separated their ranges--we prefer to use the name combination Clethrionomys occidentalis nivarius.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "occidentalis" in a variety of sentences. We hope that you will now be able to make sentences using this word.