For example under this topology, it would not include _Silesaurus_:
(Silesaurus, (Megalosaurus, (Hylaeosaurus, Iguanodon)))
But under this topology, it would include _Silesaurus_:
(Megalosaurus, (Silesaurus, (Hylaeosaurus, Iguanodon)))
This is the usual way to write trees as plain text. They mean the following:
|--S
`--+--M
`--+--H
`--Iand
|--M
`--+--S
`--+--H
`--I