How to calculate height of a cascade or semi-cascade?

Hi all,

It may be an extremely stupid question on my part, but here goes anyway.
From what I undersand, the height/size of a bonsai is calculated from the rim of the pot/base of the trunk to the apex of the tree.
I'm using the wikipedia measurements in my case to calculate : http://en.wikipedia.org/wiki/Bonsai#Size_classifications

How do you calculate the height of a cascade or semi-cascade?

Thanks in adv.

Well, the apex is in the same place, so its height is whatever distance it is from the soil line, as with othr trees.

But THEN, you also can measure the length of the tail from the point it leaves the trunk.

This one is 5 inches tall and 19 inches long.

Thanks Jim,

Side question : what species is you cascade in the picture?
The bloom is eye catching.

Flowering quince