This generator calls 15 random tree calls. There are two different types of names: one is a common type and the other a random "initial" type. In most fictional styles these names fit well and are used as the 'Whomping Willow' in Harry Potter very frequently. In these 6 names, all tree forms are actual trees. The last 4 names are random names, almost none. The design of the names was based on real tree names, but with a much wider range. Names like these are not always used in literature, but rather trees based on those in real life, they seem to fit well for names in various languages or for entirely new trees.
To generate another 15 random names you just have to press the button. With every click 15 new names are generated.