Morphological and anatomical observations on Ranunculus auricomus L. var. biformis L. in Vlasina Lake, Serbia

R. auricomus var. biformis L. (R. binatus Kit.) grows mainly in the suburbs of Vlasina plateau beside a variety of other species and forms one part of the peat-land association. Specimens were collected from the northeast coastal flooded area of Vlasina Lake (Latitude: 42° 41' 46 N, Longitude: 22° 22' 14 E). In this study, some morphological and anatomical characteristics were investigated. Samples for anatomical analysis were prepared according to the standard methods described by Ruzin (1999) though, slightly modified (Atanackovic et al., 2012). Morphological features such as leaf, petiole, stem, and root have been described. The anatomy presented in this work form the first of its kind available in the literature about this variety found in the Vlasina Lake. Transverse sections of ground-leaf, upper-leaf, petiole, stem and root have been examined and photographed. The observed morphological and anatomical feauters showed that the species grows in these flooding conditions.