. Contributions from the Botanical Laboratory, vol. 9. Botany; Botany. ' "K. ^nv*,, ^â ;^> ! -V ^â¢^l A. ⢠::$^^: u.;/ â «#^kt>i% Phot. 3. Pinus silvestris forming the tree-hne at 1200 metres. Si. Phot. 4. Fagus taiivica creeping down on the south slope; summit of Yaila to the right. SEIFRIZâSketches of the Vegetation of some Southern Provinces OF Soviet Russia: I, Altitudinal Distribution in the Crimean Mountains Vegetation of some Southern Provinces of Soviet Russia 368 the world-wide Epilobium angustifoUum (not a typical Crimean plant); Echium vulgare; Cirsium incanum;
. Contributions from the Botanical Laboratory, vol. 9. Botany; Botany. ' "K. ^nv*,, ^â ;^> ! -V ^â¢^l A. ⢠::$^^: u.;/ â «#^kt>i% Phot. 3. Pinus silvestris forming the tree-hne at 1200 metres. Si. Phot. 4. Fagus taiivica creeping down on the south slope; summit of Yaila to the right. SEIFRIZâSketches of the Vegetation of some Southern Provinces OF Soviet Russia: I, Altitudinal Distribution in the Crimean Mountains Vegetation of some Southern Provinces of Soviet Russia 368 the world-wide Epilobium angustifoUum (not a typical Crimean plant); Echium vulgare; Cirsium incanum; Linaria vulgaris (it is always of interest to find in far corners of the world species identical with those so familiar at home); Melampyrum nemorosum (Scrophulariaceae); Ranunculus polyanthemos; Salvia glutinosa, with its ingenious automatic spring for cross pollination; the endemic, Melilotus tauricus] and Lappa {Arctium) tomentosa (Compositae), with huge (maximum 18 inch) heart-shaped leaves. One fern is met with, Dryopteris filix-mas. Zone IV. The tree line (1000-1250 m.). As one climbs on to the first shelf of the high Yaila plateau at about 1000 m. or more, there is a sudden change in the type of vegetation. The change may be clear cut or not, depending upon the topography of the imme- diate surroundings. Alpine plants make their first appearance. Trees are much reduced in size, more irregular in shape, and occur in smaller groups of close formation. Typical Krummholz is met with. Here occurs the tree line, formed by Pinus silvestris (PL XV, Phot. 3) and Fagus taurica (Phot. 4); the two species rarely occur together. On the western slope of the Nikita spur the pine alone forms the tree line. On the eastern slope the beech predominates. The fourth zone does not form a continuous belt, nor is it extensive in width. It consists of scattered areas where the trees of the third zone, more dwarfed in size, get up into the alpine pastures. The tree line region is essenti
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectbotany, bookyear1892
