It's true botany is botany, but I think one can use the term botanical sciences
to refer to the group of related studies, such as taxonomy, botanical
biochemistry, ethnobotany, agronomy, plant nutrition, etc. as well as botany
itself.
Iris,
Central NY, Zone 5a, Sunset Zone 40
"If we see light at the end of the tunnel, It's the light of the oncoming
train."
Robert Lowell (1917-1977)