Now that I am working with Ross Mounce on phylogenetic trees and related sciences I have to learn about what some of the diagrams mean. This is the first in hopefully a series of posts
Here's a diagram from BMC Evolutionary Biology http://www.biomedcentral.com/content/pdf/1471-2148-12-26.pdf
And here's one from from Molecular Phylogenetics and Evolution
So what is the main difference between them? I'd welcome reader's comments.
A number of people have commented that they cannot see the second image. This is very common. There is a simple, clear explanation. No-one has fully explained why yet.