Robert Alexander Robertson FLS FRSE (1873–22 January 1935) was a Scottish botanist.
[1] He was born in Rattray in Perthshire in 1873 and educated locally before going to the University of Edinburgh study botany, and graduating with an MA BSc in 1889.
He joined the staff of the University of St Andrews lecturing in practical zoology.
In World War I he was in charge of the Officer Training Corps (OTC) at the University, with the rank of captain.
His proposers were David Fraser Harris, Sir Peter Redford Scott Lang, William Carmichael McIntosh, and Edward Albert Sharpey-Schafer.