Plant names and their meanings

The Aztecs used a plant they called "accotli" (literally "hollow pipe") to water their crops. This tall plant grew to 10m/30' tall and the stems were felled to take water to the crops.
In 1789 specimens of accotli were collected and sent to the Royal Gardens in Madrid, where the curator l'Abbe Cavanilles, named the flowers after his Swedish horticultural assistant, Andreas Dahl.


The dahlia had arrived in Europe.

Oh wow, I didn't know that! Then actually that answers a life long question of mine that I never really felt satisfied that I knew the answer to... if they're pronounced day-lee-ah or daal-ee-ah....
Dahl is pronounced like daal (the indian lentil dish), so does that mean they're pronounced daal-ee-ah?