Clarence Bicknell (1842-17 July 1918) was a British amateur botanist and archaeologist. While employed as a vicar in Bordighera, Italy, Bicknell became noted for his identification of the plants and petroglyphs of the Ligurian Riviera. Bicknell's notable writings include Flowering Plants of the Riviera and Neighboring Mountains (1885) and Guide to the Prehistoric Rock Engravings of the Italian Maritime Alps (1913). His extensive collection of specimens and illustrations were archived in the Clarence Bicknell Museum in Bordighera and at the University of Genoa. This was the first museum created in Western Liguria. He was a supporter of Esperanto, and wrote and translated poems in that language. In 1912, he was awarded the Natural Flower at the Internaciaj Floraj Ludoj.
E. Bernadini, Le alpi marittime (1979), 142–8 A. N. Branghain, The naturalist's Riviera (1962) NHM, 92 BIC • BM, Bicknell corresp. D. Hawkins, ‘Labour of twelve summers’, Country Life, 173 (1983), 1112–16 H. Lumley and others, Les gravures rupestres de l'age de bronze dans le région de Mt. Bégo (1976) South European letters, 1901–1914, RBG Kew, 148 Oxford Dictionary of National Biography doi:10.1093/ref:odnb/41049