Distribution map for <b><a href="//commons.wikimedia.org/wiki/Category:Cupressus_pygmaea" title="Category:Cupressus pygmaea"><i>Cupressus pygmaea</i></a></b> (<i><a href="//commons.wikimedia.org/wiki/Category:Cupressus_goveniana" title="Category:Cupressus goveniana">Cupressus goveniana</a></i> var. <i>pygmaea</i>) — Mendocino Cypress
James R. Griffin &amp;  William B. Critchfield
1972
<a rel="nofollow" class="external text" href="http://www.fs.fed.us/psw/publications/documents/psw_rp082/psw_rp082.pdf"><i>The distribution of forest trees in California.</i> Berkeley: U.S.D.A. Forest Service. 1972</a> (modified by the uploader for clarity)