Sergei Gavrilovich Navashin (Russian: Сергей Гаврилович Навашин; 14 December 1857 – 10 December 1930) was a Russian and Soviet botanist and cytologist. In 1898 he discovered double fertilization in flowering plants, a fundamental process in angiosperm reproduction. His work played a major role in the development of plant cytology and embryology.

Biography

Navashin was born in Tsarevshin in the Saratov Governorate of the Russian Empire. The son of a physician, he graduated from the Saratov Gymnasium in 1874 and entered the Medical-Surgical Academy in Saint Petersburg.