Hellmut R. Toelken

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Hellmut R. Toelken (born 1939) is a South Australian botanist. He retired in December 2008 from the position of senior biologist at the State Herbarium of South Australia, but remains an honorary research associate. Earlier he was with the Botanical Research Institute, Department of Agricultural Technical Services, Pretoria, S Africa.

His interests include the genera Kunzea, Hibbertia, Crassula and Carpobrotus. He is the author of the book A Revision of the Genus Crassula in Southern Africa.{{cite web|url=http://kiki.huh.harvard.edu/databases/botanist_search.php?id=65735|title=Harvard University Herbaria & Libraries - Index of Botanists - Toelken, Helmut R.|work=Harvard University Herbaria|publisher=Harvard University|accessdate=24 November 2017}}{{cite web|title=Dr Hellmut Toelken|url=https://www.environment.sa.gov.au/Knowledge_Bank/Science_and_research/State_Herbarium/Our_people/Dr_Hellmut_Toelken|publisher=Government of South Australia Department of Environment, Water and Natural Resources|accessdate=25 November 2017}}{{cite book|last1=Tölken|first1=Helmut R.|title=A revision of the genus Crassula in southern Africa|date=1977|publisher=Bolus Herbarium, University of Cape Town|location=Rondebosch|isbn=079920207X}}{{Citation | author1=Jessop, J. P. (John Peter), 1939- | author2=Toelken, H. R. (Hellmut Richard), 1939- | author3=Black, J. M. (John McConnell), 1855-1951. Flora of South Australia | author4=Flora and Fauna of South Australia Handbooks Committee | author5=Jessop, J | author6=Toelken, H | title=Flora of South Australia | publication-date=1986 | publisher=South Australian Government Printing Division | edition=4th | isbn=978-0-7243-4648-6 }}

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