Shaving Brush Tree - Bonsai Starter. This is one of the best candidates in existence for large bonsai! Although this plant can grow into a giant tree, but it can also be kept contained in a pot: this causes it to grow a massive caudex that resembles a tortoise shell! It is a unique choice for bonsai due to its striking flowers and distinctive trunk. As a bonsai, it features a swollen base (caudex) that gives it a sturdy and aged look, even when young. Huge, brush-like white flowers that look like shaving brushes emerge after winter dormancy, before foliage. It's a beautiful and exotic option for bonsai enthusiasts. See pictures of the bonsai starter and of the flowering bonsai.