CB Leave

A long long time ago, while I was serving NS, one fine day during a camouflage training session as a recruit,  the trainer shown us this plant and told us it is a no-no to use its leave as camouflage material.

I recognised its leaves as those that are used for wrapping nasi-lemak. But the instructor than proceeded to tell us the name of the plant: the CB plant! I am sure botanists are going to scratch their heads over the name. The people in the know will be able to identify it as Dillenia suffruticosa or by its common name Simpoh Air and definitely not a CB plant. What in the world is a CB plant? The trainer than proceeded to show us why it is called the CB plant:
This is a close up of one of the leave
Right at the base of the leave where the main stem meets the stalk there is a sort of gap:

 Press it open and this is what you get:

Errr get the picture now? No? Still don’t get it? Do I really have to spell it out?

CB is the abbreviated version of a Hokkien (local dialect) word for a certain part of the female anatomy. Now do you get it?