Abercrombie, John (1726–1806)
Adanson, Michel (1727–1806)
Akeley, Carl (Ethan) (1864–1926)
Allard, Harry A(rdell) (1880–1963)
Alpini, Prospero (1553–1616)
Ames, Oakes (1874–1950)
Amici, Giovanni Battista (1786–1863)
Anderson, Edgar S(hannon) (1897–1969)
Arber, Agnes (1879–1960)
Arnon, Daniel I(srael) (1910–1994)