Anne Casimir Pyramus (or Pyrame) de Candolle (20 February 1836, Geneva – 3 October 1918, Chêne-Bougeries) was a Swiss botanist, the son of Alphonse Pyramus de Candolle.

He studied chemistry, physics and mathematics in Paris (1853–57), later spending time in England, where he met with Miles Berkeley.

As a plant physiologist, he conducted investigations on the movement of leaves, the curling of tendrils, the effect of low temperatures on seed germination and the influence of ultraviolet radiation on flower formation.

[3] He continued work on Monographiae phanerogamarum, a project begun by his father,[4] and was co-editor of the Archives des sciences physiques et naturelles (Geneva).

He held honorary degrees (doctor honoris causa) from the universities of Rostock, Geneva, Aberdeen and Uppsala.