umbrella catalpa

noun

Definition of umbrella catalpa

: a horticultural catalpa that is obtained by grafting a scion or scions of a dwarf variety (C. bignonioides variety nana) on a tall straight bole of the common catalpa (C. bignonioides) and that is characterized by a dense umbrella-shaped head formed of numerous leaf-bearing branches

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“Umbrella catalpa.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/umbrella%20catalpa. Accessed 26 Nov. 2020.

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