1) Asa Gray for one 2) Asa Gray was one 3) Biologist 4) Burbank or Carver 5) Flora expert 6) Gray or Torrey 7) Life scientist 8) Linnaeus, notably 9) One whose field is flowers 10) One with a flower fetish 11) Phytologist 12) Plant inspection expert 13) Plant manager 14) Plant person 15) Plant scholar 1) Banks 2) Carver 3) Cohn 4) Curtis 5) Devries 6) Jussieu 7) Linnaean 8) Linnaeus 9) Linnean 10) Mendel 11) Mendelian 12) Mycologist 13) Phytologist 14) Propagator 15) Tradescant 
A Botanist is a person who study plants ...
• (n.) One skilled in botany; one versed in the knowledge of plants.
A person who pursues the scientific study of the structure, growth, and identification of plants.
Bot'a·nist noun [ Confer French botaniste .] One skilled in botany; one versed in the knowledge of plants. 
[n] - a biologist specializing in the study of plants
phytologist noun a biologist specializing in the study of plants
a specialist in botany.