| 单词 | umbrella catalpa | 
| 释义 | umbrella catalpanoun  : 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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