Agnia Sergeyevna Losina-Losinskaja (Агния Сергеевна Лозина-Лозинская) (1903–1958) was a Soviet botanist.
[2] She is the author or co-author of the botanical names of at least 216 taxa, including species of Calligonum, Cortusa, Fragaria, Micranthes and Rheum, as well as Galanthus woronowii and the synonym Muscarimia muscari.
[3] Two economically important crop plants were amongst her interests.
She produced a monograph on Rheum (rhubarb), suggesting that the genus had two primary centres of origin: the older being in China, the younger in Iran, spreading later into Central Asia.
[6] In a memoir by the botanist Anastasia Semenova-Tian-Shanskaja, she is referred to as the favourite student of Vladimir Komarov,[7] after whom the Komarov Botanical Institute is named and who was the senior editor of the Flora of the USSR until his death in 1945.