Nikolai Nikolayevich Tzvelev (also romanized Nikolái Tsveliov; ) (January 31 (according to the passport February 3) 1925, Tambov - July 19, 2015, St. Petersburg) was a Russian botanist, a specialist in the field of systematics, floristry, morphology and evolution of vascular plants. He was a corresponding member of the Russian Academy of Sciences (2000) .