Phytodiversity of Eastern Europe

27-44

Authors: Vasjukov Vladimir Mikhajlovich, Saksonov Sergej Vladimirovich, Senator Stepan Aleksandrovich

The article provides a list of 102 local endemic and 127 sub-endemic species of vascular plants of the Volga River Basin.

120-128

Authors: Sukhorukov Alexander Petrovich, Vasjukov Vladimir Mikhajlovich, Kushunina Maria Aleksandrovna

New data on the distribution of some alien taxa in Moscow, Ryazan, Saratov, Samara and Tambov regions is presented, along with the discussion of the ecology and distribution pattern of several neophytes in the European Russia. New records of alien plants are presented for Ryazan (Amaranthus powellii (Amaranthaceae), Glycyrrhiza glabra (Fabaceae)), Samara (Eriochloa villosa (Poaceae)), Tambov (Echinochloa muricata (E. microstachya), Eriochloa villosa (Poaceae), Helianthus lenticularis (Asteraceae)) and Moscow regions (Rumex patientia (Polygonaceae)). It was discovered that R. patientia is the most common species of the genus in the Saratov region eastward of the Volga River, where R. confertus, which is prevailing in the western part of the region, becomes rare. Echinochloa muricata and Eriochloa villosa are encountered more and more often, which may indicate that these grasses are progressively naturalizing in the European Russia.

135-144

Authors: Philippov Dmitriy Andreevich

The present article is devoted to the rare mire species – Oxycoccus microcarpus Turcz. ex Rupr. Distribution of O. microcarpus in Vologda region, ecological and phytocoenotic features of the species, as well as its protection were discussed. O. microcarpus prefers positive landforms of mesooligo- and oligotrophic bogs with peat banks, significantly less common in minerotrophic mires and carpet-hollow communities in raised bogs. Usually, O. microcarpus is found jointly with mire forms of Pinus sylvestris and a wide range of plants forming a herb-shrub layer (Chamaedaphne calyculata, Rubus chamaemorus, Oxycoccus palustris, Eriophorum vaginatum, rarely Empetrum nigrum, E. hermaphroditum, Ledum palustre, Vaccinium uliginosum) and mosses (mainly Sphagnum fuscum and S. angustifolium, S. magellanicum, S. rubellum, Polytrichum strictum and lesser with S. balticum, S. papillosum, etc.). O. microcarpus was found growing with more active closely related Oxycoccus palustris and had low coenotic value (usually, from 1-2% to 5-7% of projective cover). To date, O. microcarpus was spotted on 31 mires (findings are listed) from 11 districts of the Vologda region. Two-thirds of the sites belong to the middle boreal (middle taiga) subzone. A habitat of O. microcarpus is tend to reduce, thus the species must be protected.

151-164

Authors: Vikulin Sergei Vasilyevich, Varenov Dmitriy Vladimirovich, Konovalova Alena Alexandrovna

Fossil impression and contr-impression of fern described in this study were collected in Paleocene sandstone from the quarry near village Trubetchino ("Mishanin bugor"), Syzran’ district, Samara region, mid-Volga area of European Russia. Specimens are preserved as sandstone compressions and show features of frond morphology and venation. Frond is pinnate-pinnatifid, vegetative pinnules with simple venation. Venation is open, with each lobe of the pinnatifid pinnule having a mid-vein from which laterals diverge in an alternate pattern. Laterals of vegetative pinnule lobes fork and terminate at the margin, whereas other laterals of pinnule lobes remain unbranched. This fern, identified as Speirseopteris sp., displays characters that are diagnostic of the highly derived filicalean families and is assigned to the Thelypteridaceae.

192-198

Authors: Savinova Tatiana Nikolaevna

In 1915-1919 there was the scientific Soil expedition on the territory of Orenburg province. At this time K.A. Kosmovsky, O. A. Smirnova and other scientists began system botanical researches of the territory. They collected a big herbarium. Research on identification of botanical heritage of Orenburg region and collecting biographic data on botanists will be continued.

202-209

Authors: Chibilev Alexander Alexandrovich, Grosheva Olga Alexeevna

The main resumes of VII International Symposium “Steppes of Northern Eurasia” which in 2015 had been held in a format of the International Steppe Forum of the Russian Geographical Society, are overviewed. A new view at steppes of Eurasia - Steppe Eurasia as a transcontinental historical - geographical space covering not only the steppe landscape zone of Europe and Asia but forest-steppe and semi-desert zones adjacent to them, is developed. Key reports presented on the Symposium and results of Round Table meetings concerning desertification and reservation issues are considered.