money tree

Short definition from Wiktionary

Noun

1. 1
   An imaginary tree from which money can be plucked. See money doesn't grow on trees.
2. 2
   The Malabar chestnut, Pachira aquatica.
3. 3
   The jade plant, Crassula ovata.
4. 4
   The cocoa tree, Theobroma cacao.
5. 5
   A kind of holy tree believed to bring money and good fortune.
6. 6
   A miniature tree sculpture decorated with currency, often used as a raffle prize or a gift.
7. 7
   A cheap tree sculpture, decorated with currency, used as a raffle prize because it would be illegal to offer a cash prize.