It can get fat. Photo of an 40 years old bonsai from: Johann
Kastner.

Large trees can be
found around the world. This one is from Copenhagen Botanical
Garden.
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This (only) member of
the Ginkgoaceae family might not be a caudiciform, BUT: I just must
have this ancient plant. After all, it is the most caudiciform
member of the entire Ginkgophyta division, and after only 2.500
years, it does look kind of fat!
It was described by
Carl von Linnaeus in 1771, only found in Japan, growing in all from
sand to rich peat. Some water and some to much sun, and it will grow
to four meters in diameter and 40 meters height.
There are male and female plants, and after 20 years, it might give
fruits.
Much more info on:
THE GINKGO PAGES
Also seen as a member
of the Coniferae family.
Ginkgo
is derived from the Japanese word ginkyo, meaning "silver
apricot", referring to the fruit, which is eaten in Japan. Biloba
translates as "two-lobed", referring to the
split-in-the-middle character of its fan-shaped leaf blades.
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