Seed quality of Aristolochia macrophylla Lam. and A. manshuriensis Kom. in St. Petersburg by K. G. Tkachenko, G. A. Firsov, A. V. Volchanskaya

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Pollen of <i>Pterocarya</i> (Juglandaceae) representatives from natural habitats and St. Petersburg environments by O. A. Gavrilova, G. A. Firsov, D. A. Gornov, A. N. Semenov, A. V. Volchanskaya

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<i>CYDONIA OBLONGA </i> MILL. (ROSACEAE) AT THE PETER THE GREAT BOTANICAL GARDEN by G. A. Firsov, A. V. Volchanskaya, K. G. Tkachenko, N. E. Staroverov, A. Yu. Gryaznov

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PYRUS ZANGEZURA (ROSACEAE) AT SAINT PETERSBURG by K. G. Tkachenko, G. A. Firsov, L. F. Yandovka, A. V. Volchanskaya, N. E. Staroverov, Yu. A. Gryaznov

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