 <p>You can use <code>rev(dd)</code>; <code>rev.dendrogram</code> simply returns the dendrogram with reversed nodes:</p> <pre><code>hc &lt;- hclust(dist(USArrests), "ave") dd &lt;- as.dendrogram(hc) plot(dd) </code></pre> <p><img src="https://i.stack.imgur.com/3GN1Q.png" alt="dendrogram"></p> <pre><code>plot(rev(dd)) </code></pre> <p><img src="https://i.stack.imgur.com/6LNto.png" alt="reversed dendrogram"></p>