Izvestiya of Saratov University.
ISSN 1816-9775 (Print)
ISSN 2541-8971 (Online)


Morphological Variability in Populations of Chondrilla L. (Asteraceae) in European Russia

The morphological variability in populations of Chondrilla was subject to the numerical analysis using the unweighted pair group method with arithmetic mean (UPGMA). The study showed that out of the seven species of the genus found in European Russia, it is only C. ambigua that has the status of undoubted species. A distinct difference is observed between the two groups of populations: the first group comprising C. juncea, C. latifolia, C. brevirostris, and the mixed population of C. juncea/graminea; and the second group comprising the populations of C. graminea and C.

Special Features of Flowering in Some Clematis L. Species and Forms from Nikita Botanical Gardens Collection

In the studies of ornamental plants seasonal development, flowering rhythms are exceptionally important, since the main criteria for the ornamental value of plants used for landscaping, are the time and duration of their flowering. The aim of the present work was to identify special features of flowering in some Clematis L. species and forms from Nikita Botanical Gardens collection. The objects of this study were 16 taxa. The methodology was based on the principles of introductory studies. Phenological and mathematical methods were applied.