2021, Vol. 106, N 4

CONTENTS

Communications

S. I. Genkal, О. G. Gorokhova. Diatom algae (Bacillariophyta) of the rivers flowing into Lake Elton

S. I. Grabovik, L. V. Kantserova. Monitoring of vegetation cover change in a drained mesotrophic herb-Sphagnum mire in Southern Karelia

L. V. Koval, L. M. Horshkova. Synanthropic flora of the Desna Plateau (Sumy Region, Ukraine)

Т. S. Sedel’nikova, А. V. Pimenov. Variability of chromosome number and chromosomal rearrangements in Pinus sylvestris (Pinaceae) in arid conditions of the Lower Volga and Southern Siberia

G. M. Anisimova, I. I. Shamrov. Gynoecium and ovule structure in Sedum kamtschaticum and Sedum palmeri (Crassulaceae)

V. N. Godin, T. V. Arkhipova, A. N. Tagieva. Andromonoecy and its manifestation in inflorescences of Chaerophyllum aromaticum (Apiaceae) in Moscow Region

Floristic Records

А. А. Oleinik, O. V. Chovgan. First records of Protoperidinium laticeps and P. thulesense (Dinophyta: Peridiniales) in the European Arctic seas

I. N. Timukhin, A. I. Shmakov, B. S. Tuniyev. New records of Pteridophyta in the Caucasus

Jubilees and Memorial Dates

O. V. Khitun, O. G. Baranova, V. A. Bubyreva, T. M. Koroleva, V. V. Petrovsky, A. D. Potemkin, M. Yu. Telyatnikov. Olga Vladimirovna Rebristaya (to the 90th anniversary)