Lawrence Alexander Sidney Johnson FAA, known as Lawrie Johnson, was an Australian taxonomic botanist. He worked at the Royal Botanic Gardens, Sydney, for the whole of his professional career, as a botanist, Director and Honorary Research Associate.
Alone or in collaboration with colleagues, he distinguished and described four new families of vascular plants, 33 new genera, 286 new species, and reclassified another 395 species.
Of the families he described, Rhynchocalycaceae is accepted by the Angiosperm Phylogeny Group. Hopkinsiaceae and Lyginiaceae, have not been accepted by the APG.
Lawrie Johnson died of cancer in 1997.
He received many honours and awards, including:
1979 The Clarke Medal of the Royal Society of New South Wales
1984 The Mueller Medal of ANZAAS
1986 Elected a Fellow of the Australian Academy of Science
1987 Appointed a Member of the Order of Australia "For service to the science of botany as Director of the Royal Botanic Gardens in Sydney"