Frank Lincoln Stevens (April 1, 1871, Onondaga County, New York – August 18, 1934, Winnetka, Illinois) was an American mycologist and phytopathologist.
[3][4] In his boyhood and teenage years he read about science, created a homemade laboratory, and made, within Onondaga County, comprehensive collections of ferns and geological specimens.
[5] With advice from David Grandison Fairchild, whom he encountered at the Agricultural Experiment Station in Geneva, New York, Stevens matriculated at Rutgers University to study botany and, especially, plant pathology.
For a number of years he was a biologist and the head of the department of plant diseases at the North Caroline Agricultural Experimental Station.
[2][13] In Puerto Rico, the collection by Stevens from 1912 to 1914 of rusts (fungi in the order Pucciniales, previously known as Uredinales) made a valuable contribution to tropical mycology.
During his Illinois professorship he collected in Guyana, Peru, Ecuador, Panama, Costa Rica, the Philippines, and Hawaii.
[2] He collected Hawaiian fungi from 1920 to 1921 when he was on academic leave absence as a Bishop Museum Fellow appointed by Yale University.