As a professional botanist, Dr. Shetler keeps records of these things.

Being married to a professional botanist has its ups and downs.

This might be explained by the fact that she's a professional botanist.

Members range from casual gardeners to professional botanists employed by major botanical gardens.

This is probably the majority position amongst professional botanists.

The organization was founded by "some professional botanists and many enthusiastic amateurs".

Many of the volunteers are professional or amateur botanists or students of botany.

He may have been the first professional botanist to reside in Florida.

The Pakistan Botanical Society is a learned society of professional botanists.

He catalogued the local flora and corresponded with professional botanists about them.