-1846) was a Scottish botanist who began his working life as a gardener in the neighbourhood of Edinburgh.
[1] Main's botanical career began when he was employed by George Hibbert, who despatched him to China to collect plants.
Main also collected for Gilbert Slater of Essex, and is credited with the introduction of the Chinese elm Ulmus parvifolia in 1794.
Some years later, Main turned to farming in Scotland, but was unsuccessful.
A horticultural autodidact, he made a living as a writer, submitting frequent papers on horticultural and agricultural practice to the principal periodicals of the day, progressing to books.