This function adds a geological (or other temporal) legend to a plotted tree.
geo.legend(leg=NULL, colors=NULL, alpha=0.2, ...)
a matrix with the starting & ending point of each plotted era in rows, & names of the time periods as rownames.
a vector of colors for the time periods of the rows in leg
.
transparency level to apply to colors
.
optional arguments.
Functions adds a visual element to a plotted tree.
Revell, L. J. (2012) phytools: An R package for phylogenetic comparative biology (and other things). Methods Ecol. Evol., 3, 217-223.