Grow your own

For an assigment I need to choose something from nature - Judas Penning is definetily one idea to keep in mind. Judas penning (penning means coin) is named this way because of the seeds that look like coins. Judas betrayed Jesus for money and they say that when Judas hanged himself coins fell to the ground, and at that spot Judas Penning grew out of the ground. 
Inspired by this story and plant I have to create a product - so we shall see...