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Robert Allen Dyer | |
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| Born | 21 September 1900 |
| Died | 26 October 1987 (aged 87) Johannesburg, South Africa |
| Alma mater | Natal University College |
| Known for | Pretoria National Botanic Garden, work on succulent plants and Amaryllidaceae |
| Scientific career | |
| Fields | Botany, taxonomy |
| Institutions | National Herbarium in Pretoria |
| Author abbrev. (botany) | R.A.Dyer |
Robert Allen Dyer (21 September 1900 in Pietermaritzburg – 26 October 1987 in Johannesburg) was a South African botanist and taxonomist, working particularly on Amaryllidaceae and succulent plants, contributing to and editing of Bothalia and Flowering Plants of Africa and holding the office of Director of the Botanical Research Institute in Pretoria from 1944 to 1963.