Noun umbrella tree has 2 senses

• umbrella tree(n = noun.plant) brassaia actinophylla, schefflera actinophylla - erect evergreen shrub or small tree of Australia and northern New Guinea having palmately compound leaves; Array
is a member of genus schefflera, schefflera
is a kind of bush, shrub

• umbrella tree(n = noun.plant) elk-wood, elkwood, magnolia tripetala, umbrella magnolia - small deciduous tree of eastern North America having creamy white flowers and large leaves in formations like umbrellas at the ends of branches; Array
is a kind of magnolia