umbrella tree
noun
: any of various trees or shrubs resembling an umbrella especially in the arrangement of leaves or the shape of the crown
especially : a widely cultivated schefflera (Schefflera actinophylla synonym Brassaia actinophylla) of Australia and New Guinea having leaflets radiating from an elongate petiole
Example Sentences
Recent Examples on the Web Tree species brought to the site by the Chicago Region Trees Initiative included American hornbeam, American plum, hackberry, shagbark hickory, chinkapin oak, shingle oak, wahoo and umbrella tree magnolia, according to officials. 
Kaitlin Edquist, chicagotribune.com, 29 Sep. 2020 If so, how? – Marion County A: Thanks for your question about pruning a Schefflera or umbrella tree. oregonlive, 20 Dec. 2019
Kaitlin Edquist, chicagotribune.com, 29 Sep. 2020 If so, how? – Marion County A: Thanks for your question about pruning a Schefflera or umbrella tree. oregonlive, 20 Dec. 2019 Word History
First Known Use
circa 1790, in the meaning defined above