Walter Watson (1872–1960) was a British lichenologist who made contributions to the study of lichens and bryophytes in the United Kingdom.
His research focused primarily on the botany of Somerset, where he settled, and he authored numerous papers on lichen and bryophyte floras.
He received recognition for his contributions to the field, including a Doctor of Science degree from the University of London and honorary associate status with the Linnean Society.
Watson's career in education began in Larne, followed by positions in Sexeys, Bruton, Somerset, and eventually as the head of the science department at Taunton School in 1925.
Perhaps enthused by Karl von Keissler's similar 1930 work on European members of this group, in 1948 Watson published a checklist of 148 lichenicolous fungi recorded from Great Britain and Ireland.
[4] His research was recognised with a Doctor of Science degree from the University of London in 1922, and he was made an honorary associate of the Linnean Society in 1918.