]> [author note: Herbarium and types: LE] Example of Names Published: Bistorta subgen. Bistortella Petrov, Izv. Glavn. Bot. Sada S.S.S.R. 27(2): 220 (227) (1928); Dryopteris pulchella var. continentalis Petrov, Fl. Iakut. fasc. 1: 14 (1930). Botany Petrov, Vsevolod Alexeevich Petrov, Vsevolod Alexeevich V. A. Petrov Petrov Vsevolod Alexeevich Petrov Petrov, Vsevolod Alexeevič 1896 1955