Elsie Elizabeth Esterhuysen

Elsie Elizabeth Esterhuysen (11 April 1912 – 1 January 2006) was a South African botanist.

She was described as "the most outstanding collector ever of South African flora", amassing 36,000 herbarium specimens.

She concentrated on collecting from the high altitude areas of the Cape as she was also a capable mountaineer.

Including in 1967, Louisa Bolus (another South African botanist) named a genera of plant (in the family Aizoaceae) from the Cape Provinces, Esterhuysenia.

[citation needed] She was awarded an honorary Masters of Science Degree by the University of Cape Town in 1989.