He started work as an assistant in the Herbarium at Kew in 1873, and was promoted to the position of Assistant Keeper in 1909, which he kept until 1914. He produced many annotated drawings of succulent plants in his work revising the genus Mesembryanthemum, which were published in 1931.[1] He was the author of several works on the taxonomy of plants, particularly succulents. The Araceae genus Nebrownia was named in his honour by Otto Kuntze. A number of plants bear the specific name "nebrownii" - such as Acacia nebrownii, Gibbaeum nebrownii, Caralluma nebrownii and Lithops olivacea v nebrownii, as does a waterhole in the Etosha National Park.[2] The plant Anthurium brownii and the genus Brownanthus (now a synonym of Mesembryanthemum) also bear his name.