| 2023-01-05 | Yellow-flowered medicinal plant |
| 2020-12-23 | Ingredient in some medicinal teas |
| 2015-04-04 | Kind of tea used medicinally |
| 2015-03-20 | Medicinal shrub |
| 2015-02-19 | Plant used in herbal remedies |
| 2014-03-02 | Medicinal plant |
| 2013-04-15 | Medicinal plant |
| 2012-10-30 | Medicinal plant |
| 2011-07-20 | Medicinal shrub |
| 2010-06-13 | Medicinal plant |
| 2008-04-21 | Drug-yielding shrub |
| 2005-12-22 | Medicinal shrub |
| 2004-12-05 | Drug-yielding plant |
| 2003-10-21 | Drug-yielding shrub |
| 2003-08-31 | Medicinal plant |
| 2001-07-19 | Medicinal plant |
| 2000-10-14 | Medicinal plant |
| 1999-10-10 | Cathartic drug |
| 1999-06-17 | Medicinal plant |
| 1997-12-24 | Medicinal plant |
| 1997-03-21 | 1990-91 World Grand Prix champion |
| 1996-09-08 | Cathartic drug |
| 1996-06-09 | Plant yielding a cathartic drug |
| 1994-04-24 | Medicinal herb |