Vol. 49/2018 Contents

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Tiwari U. L., Chowlu K. & Borah S.
Impatiens cyclosepala Hook. f. ex W.W. Sm. – a new species record for the flora of India from Arunachal Pradesh. Biodiv. Res. Conserv. 49: 1-6.
Pietryka M., Richter D. & Podlaska M.
The distribution of Salvinia natans (L.) All. in the Odra and the Oława River valleys in Wrocław area (Poland). Biodiv. Res. Conserv. 49: 7-14.
Hutorowicz A.
The water clarity of Polish lakes with charophyte vegetation in the years 1953-1968. Biodiv. Res. Conserv. 49: 15-28.
Kowalski W. W. A., Wróbel M. & Jurzyk-Nordlöw S.
The locality of Trapa natans L. within the region of Międzyodrze – dangers and protection perspective (the Lower Oder Valley, West Pomerania). Biodiv. Res. Conserv. 49: 29-36.