| 单词 | buttonball tree | 
| 释义 | > as lemmasbuttonball tree   buttonball  n. U.S. the buttonwood,  Platanus occidentalis, the seeds of which occur in globular clusters (more fully  buttonball tree). ΘΚΠ the world > plants > particular plants > trees and shrubs > tree or shrub groups > plane-trees > 			[noun]		 platanusOE planea1382 platana1382 plane treea1425 platan treea1425 plantain1535 plane1562 dwarf plane tree1578 chenar1638 buttonwood1670 platanus tree1670 Norway maple1731 water beech1735 American plane1781 sycamore1814 buttonball1818 London plane1860 sycamore-tree1872 1818    Panoplist June 277  				The principal trees, which I have observed, are beach,..sycamore (called button-ball at the north,) and different kinds of oak. 1914    Bull. N.Y. State Coll. Forestry No. 2 8  				Park Ave. to Lexington Ave. there are four Buttonball trees in excellent condition. 2001    Day 		(New London, Connecticut)	 13 May  a1/1  				Buttonwood or buttonball is the common name of a native species of sycamore tree that grows in northeastern river valleys. < as lemmas | 
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