ABELE
| Date | Clue |
|---|---|
| 2006-12-03 | Poplar tree |
| 2005-10-30 | White poplar |
| 2004-02-14 | White poplar |
| 2003-07-17 | White poplar |
| 1998-09-26 | White poplar |
| 1997-03-08 | Poplar variety |
| 1996-07-11 | White poplar |
| 1995-12-06 | White poplar |
| 1995-10-30 | White poplar |
| 1995-10-01 | White poplar |