Rosemary

Rosemary was a type of plant.

In Castrovalva, the Fifth Doctor detected "just a hint" of rosemary in a tonic he was given from the pharmacist Mergrave. (TV: Castrovalva)

In England in 1738, the Sixth Doctor used rosemary to counteract the effect of Grel particles. (AUDIO: The Doomwood Curse)

A rosemary plant grew outside the student union of St Luke's University. Bill Potts thought that it smelled "amazing". She was later pleased to find some in the garden on Gliese 581d, remarking that they smelled like home. (TV: Smile)