banksia
There wasn't an Aussie pilot. It was an Aussie anesthesiologist named Ugly John. After Ugly John left MASH, the actor came back as an Aussie MP named Muldoon.
The Dahlia.
Robert Brown, a Scottish botanist
They are named Botanist :)
The fuchsia plant is named after the German botanist Leonhart Fuchs. The plant was named in his honor by Charles Plumier, a French botanist who discovered fuchsias in the Caribbean in the 17th century.
There was no specific botanist who travelled with the First Fleet. The First Fleet should not be confused with the journey of James Cook up the eastern coast of Australia, when he named the land New South Wales and claimed it for England.Sir Joseph Banks was the English botanist who sailed with Cook, and after whom the banksia species of plant was named. There were also the Swedish and Finnish botanists, Daniel Solander and Dr Herman Spöring.
Perhaps the question should be "named by a botanist?" Hydrangea - or one of the plants known as the Christmas Flower (also Euphorbia pulcherrima/ Poinsettia) was first named by Carl Linnaeus - the "father" of modern botanical taxonomy.
Bouganvilleas
It was named after the Swedish botanist Anders Dahl.
Dahl was a botanist, after whom the Dahlia was named.
Begonia
It was named after a Swedish botanist so Swedish.