Here are some pictures of the random tree reduced over a finite number of nodes.
Over $32$ nodes: The random tree over 32 nodes. http://www.freeimagehosting.net/newuploads/ta8ni.png
Over $96$ nodes: The random tree over 96 nodes. http://www.freeimagehosting.net/newuploads/3yl9z.png
Over $512$ nodes: The random tree over 512 nodes. http://www.freeimagehosting.net/newuploads/qqcm4.png
I employ the following ${\tt Sage}$ code to generate these:
def random_tree(n) :
tree = Graph()
tree.add_vertex(1)
for i in xrange(2, n + 1) :
tree.add_edge(i, randint(1, i - 1))
return tree
and the following code to draw these:
tree = random_tree(32)
tree.plot(vertex_size = 24, vertex_labels = False, graph_border = True, iterations = 4096)