Abstract
The article considers endemic and subendemic species composition of Ketpen ridge flora. It has been educed that in the Ketpen ridge flora there are 46 endemic and subendemic species belonging to 28 genera and 17 families. Peculiarly, there are only 5 species belonging to 5 genera and 5 families: Endemic species of the Ketpen ridge: Fabaceae, Boraginaceae, Asteraceae, Zygophyllaceae and Brassicaceae. There are 41 species of subendemic species. The largest number of subendemic species contains the families of Asteraceae (15 species), Fabaceae (9 species), Liliaceae (4 species) and Brassicaceae (4 species). A wide range of species such as Astragalus (8 species), Galatella (4 species), Tulipa (4 species), Oxytropis (3 species), Saussurea (3 species), Taraxacum (2 species), Alchemilla (2 species), Achoriphragma (2 species) stand out among the genera. The analysis of life forms has showed that 58.2% of endemic and subendemic species belongs to the core polycarpous plants that are represented in the families of Fabaceae (11 species), Asteraceae (7 species), Brassicaceae (4 species), Lamiaceae (2 species) and a small percentage (10.8%) is represented by bulbous perennials and short-stemmed polycarpicles (6.5%).
Highlights
The study of the mountainous areas flora at the present stage is of great scientific interest
The work on studying the endemic and subendemic species flora of the Ketpen ridge within the boundaries of Kazakhstan was conducted for 12 years
In regards to species composition on the Ketpen ridge flora, Magnoliophyta department dominates which accounts for 98.4% and only a small number of 1,6% species refers to Pinophyta, Polypodiophyta, Lycopodiophyta and Equisetophyta (Fig. 3)
Summary
The study of the mountainous areas flora at the present stage is of great scientific interest. Flora study of some under-investigated regions located in a desert zone is relevant. One such region of the Northern Tien-Shan located in the territory of Kazakhstan is the Ketpen ridge. The eastern part of the ridge located in the territory of Kazakhstan is called Ketpen and its western part from the China side is called Temerlik (Fig. 1). Throughout its entire length, the northern slope of the Ketpen ridge is heterogeneous in its geomorphologic structure. It is subdivided into the following geomorphological regions: 1. Mountainous area with absolute elevations of 1300-3600 m It is subdivided into the following geomorphological regions: 1. Mountainous area with absolute elevations of 1300-3600 m
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