. Contributions from the Botanical Laboratory, vol. 9. Botany; Botany. m tv. 378 Vegetation of some Southern Provinces of Soviet Russia Turkey. The montana form of the pine along the Georgian MiUtary Way has been recognised by Fomin and Radde^ as P. silvestris var. alpina. The dis- tinction, though taxonomically doubtful, is stamped ecologically by soil preference; the montana form occurs on granite. The only other conifers along the Georgian Military Way are three junipers and a Taxus. Here, in the second forest zone (Zone IV), Juniperus oblonga occurs as a shrub, with Taxus baccata. We shall
. Contributions from the Botanical Laboratory, vol. 9. Botany; Botany. m tv. 378 Vegetation of some Southern Provinces of Soviet Russia Turkey. The montana form of the pine along the Georgian MiUtary Way has been recognised by Fomin and Radde^ as P. silvestris var. alpina. The dis- tinction, though taxonomically doubtful, is stamped ecologically by soil preference; the montana form occurs on granite. The only other conifers along the Georgian Military Way are three junipers and a Taxus. Here, in the second forest zone (Zone IV), Juniperus oblonga occurs as a shrub, with Taxus baccata. We shall meet with another juniper higher up. Picea, so typical of the Minor (South) Caucasus, where it forms beautiful specimens in extensive forests, is restricted to the western parts of the High Caucasus, both in the north and the south, Tiflis being the eastern limit. There is no spruce on the Georgian Military Way. Flowers continue to flourish in small open areas. In the wet soil along the road the rich purple spike of Lythrum salicaria var. intermedia stands m great numbers. Radde cites L, hyssopifolia as occurring in the Caucasus, though I did not meet with it. Another blue spike is that of Salvia nemorosa. Campanula rapunculoides, Picris strigosa and Aster ibericus are pretty addi- tions to the roadside flowers. Zone V. The Daryal Canyon (1300 m.). The Daryal Canyon offers little encouragement to plants (PI. XVIII,Phot. 1). In its most precipitous parts its width is barely more than that of the road and the narrow river bed combined. Its walls rise almost perpendicularly to tremendous heights. The sun enters for but a few hours each day. Yet, in its more open parts, especially near the upper end, some plants manage to exist on the rocky ledges. The montana form of the pine is to be seen perched high on rocky crags (PI. XVIII, Phot. 3). Where a little soil has gathered, clumps of Juniperus sabina and J. oblonga find a foothold, so also Berberis georgica and Euphorbia. Semperviv
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