ASAGRAY
| Date | Clue |
|---|---|
| 2019-11-08 | Charles Darwin contemporary |
| 2017-10-18 | Pioneering botanist |
| 2014-10-04 | To whom Charles Darwin dedicated "Different Forms of Flowers" |
| 2011-09-10 | Name on the highest award of the American Society of Plant Taxonomists |
| 2004-11-24 | Noted 19th-century botanist |