Biological and ecological features of the obligate glyareophytes on the upper zone rock screes in Mountain Crimea
Differentiation of petrophytes into the elements of obligate and facultative nature is determined by their genetic heterogeneity. This is also the reason for the differentiation of obligate petrophytes into ecological groups, one of which is "scree plants" - glareophytes. Glareophytes are described as vegetative mobile, drought-resistant perennial plants with well-developed main and lateral roots, rhizomes, storing organs, creeping adventitious roots and shoots, elongated peduncles. Such concept of glareeophytes bioecological features is due to the assumption that these plants are able to reduce the mobility of colluvium. The real obligate glareophytes of the Mountain Crimea are plants with short taproot and they do not change their natural habitat. The analysis of ontomorphogenesis, seasonal development and structural features of the obligate glareophytes of the Mountain Crimea was carried out. The studies of obligate glareophytes as an original group of species has been performed for the first time.