| Answer | Crossword Clue |
|---|---|
| ASAGRAY | Renowned 19th century botanist |
| ASAGRAY | Noted 19th-century botanist |
| ASA | 19th-century botanist Gray |
| ASAGRAY | 19th-century American botanist |
| MOHL | Hugo von ..., noted 19th-century botanist |
| GAUSS | Renowned 19th-century German mathematician and astronomer |
