The Kressari traded in botanical DNA. (DS9: "The Circle") The region of the planet Ledos that was inhabited by the Ventu contained botanical specimens that had high level of serum nitrates. (VOY: "Natural Law")
Tobin Dax was the only Dax symbiont who ever remotely had experience with plants. According to later host, Jadzia Dax, "the Daxes have never been much on gardening. Tobin tried it, but had even less luck with plants than he had with women. (DS9: "The Wire")
During the early 2260s, Leila Kalomi was the primary botanist of the Omicron colony on planet Omicron Ceti III. (TOS: "This Side of Paradise") One of Hikaru Sulu's hobbies was botany. (TOS: "The Man Trap", TOS: "Shore Leave") In 2266, Sulu tried to get Kevin Riley interested in botany, by having him collect leaves and plant specimens. (TOS: "The Naked Time") Botany was also one of Tongo Rad's favorite of studies. (TOS: "The Way to Eden"
Keiko O'Brien practiced botany aboard the USS Enterprise-D, but temporarily gave it up, became a teacher on Deep Space 9. Initially, Keiko has misgivings about moving to Deep Space 9, stating "Starfleet doesn't need a botanist on this station," to which her husband reassured that "there's a whole new quadrant full of new plant life to explore." (DS9: "A Man Alone") On the contrary, Miles was known around his house as "the Black Thumb," explaining to Joseph, that "the only way I could get anything to grow was to marry a botanist." (DS9: "Paradise")
When Keiko later attended a conference, she asked Jadzia Dax to care for a plant from Ledonia III, which later became sick. Dax took the plant to Doctor Julian Bashir, who, upon studying it, proclaimed, "I'm a doctor, not a botanist." (DS9: "The Wire")
Tuvok conducted botanical research on an alien orchid uncovered the presence of lysosomal enzymes, which suggested evidence of symbiogenesis. (VOY: "Tuvix") Later, during a visit to an uninhabited moon, Chakotay assigned Tuvok and Neelix to be the "botanical surveyors," and ordered them to collect Cypripedium samples. (VOY: "Tattoo")
- Botanical pathology
- Botanical pharmacology