CONTENTS. 



Proceedings of the Botanical Society of Edinburgh .... i 



Some Plant Associations of N.W. Yunnan. By F. Kingdon Ward, 



B.A., F.R.G.S 1 



On the Sino-Himalayan Flora. By F. Kingdon Ward, B.A., F.R.G.S. 13 



Notes on the Flora of the Orkney Isles. By Arthur Bennett, A. L. S. . 54 



Periodicity in Transpiration. By Sophie J. Wilkie, B. So, (Two Figures) 59 



Saxifrages of the Diptera Section, with description of New Species. 



By Professor Bayley Balfour, F.R.S 65 



The Influence of Different Media on the Histology of Roots. By Sophie 



J. "Wilkie, B.Sc. (With One Plate) 76 



Rhododendron tricJwdadum, Franch. , and its Allies, By Professor 



Bayley Balfour, F.R.S 79 



New Garden Dracocephalums from China. By W. W, Smith, M.A., 



and George Forrest 89 



Note on J'urasyringu, A New Genus of Oleaeeae, By W. W. Smith, 



M.A 93 



Rliododendronlcictewm, Franch. By Professor Bayley Balfour, F.R.S. 97 



A Hybrid Potamogeton new to the British Isles. By Arthur Beunett, 



A.L.S 104 



