如何在R中的无根树中隐藏一些标签

I am using the R package ape to draw phylogenetic trees. Some of the labels that are displayed are not of direct interest to me (e.g., "CAN", see image below) and some of them overlap (e.g., "B10", "D1" or "D3"). The idea would be to: (1) find a way to prevent some of the labels from being displayed, or (2) decrease font size to make the labels more readable. to draw phylogenet