It can be ball-shaped or more like an umbrella ... are grafted onto the top of a regular catalpa tree trunk where the graft grows and maintains its dwarf, bushy shape.

Reasonably inexpensive and available in a range of sizes, as bonsai and even growing on rocks, the dwarf umbrella tree is as versatile as houseplants come. Nonchalant when it comes to care, Shefflera ...