South african botanist (1887-1922).
Richard Arnold Dümmer (1887 in Cape Town – 2 December 1922, in Uganda) was a South African botanist who collected in South Africa, Kenya and Uganda. Dümmer worked at first in the Cape Town municipal gardens. Already at that time he issued the exsiccata-like specimen series Plantae Peninsulae Capensis. He joins Kew as a gardener in 1910. In 1911 he became assistant to Prof. Augustine Henry and had a hand in preparing Elwes and Henry's "The Trees of Great Britain and Ireland" for publication. Dümmer worked in the herbaria and libraries of Kew, the British Museum, the Linnaean Society, Cambridge,