Jenny Hempel (married Munthe) (19 February 1882 – 13 February 1975)Müller, D. (1975) Obituary in Botanisk Tidsskrift vol. 70 (2-3): 193. was a Danish plant physiology pioneer. In 1916, she was the first Danish woman to receive a doctoral degree in a botanical discipline – and until 1956 the only. She discovered the diurnal fluctuations in cell sap acidity in succulent plants, with are now known to be linked with the CAM photosynthetic pathway.
