Plugatar Yuri V. RussiaЯлтаLabour Red Banner Order Nikitsky Botanical Gardens – National Scientific Center of the RAS, 52, Spusk Nikitsky, Yalta, Nikita, 298648, Republic of the Crimea, Russiasahno_tanya@mail.ru Author's articles Biometric Characteristics and Aerodynamic Properties of Pollen Grains of North American Pines under Conditions of the Southern Coast of the Crimea