44 TRANSACTIONS OF THE [Sess. lxxvi. 



gressive successions of associations are encountered." It 

 seems to us that along these lines the somewhat complex 

 distribution of our arctic-alpine vegetation must be studied. 



LITERATURE. 



(1) Types of British Vegetation. — Edited by A. G. Tansley. 



Cambridge, 1911. 



(2) Crampton, C. B. — Vegetation of Caithness. 1911. 



(3) Schroter, L. — Taschenflora des Alpen- Wanderers (with notes 



by C. Schroter). Zurich, 1903. 



(4) Brockmann-Jerosch, H. — Die Flora des Puschlav. Leipzig, 



1907. 



(5) Schroter, C. — Das Pfianzenleben der Alpen. Zurich, 1908. 



(6) Oettli, M. — Beitriige zur Oekologie der Eelsflora. Zurich, 1905. 



(7) Rubel, E. — Prlanzengeographische Monographie des Bernina- 



gebietes. Zurich, 1911. 



(8) Heeg, . — Lebermoosen Niederdsterreichs. 



(9) Cavers, F. — "On Saprophytism and Alvcorhiza in Hepaticse." 



New Phytologist, ii., 1903. 

 (10) Macvicar, S. M. — " Distribution of Hepaticse in Scotland." 



Trans. Edin. Botan. Soc, xxv., 1910. 

 (1L) Crampton, C. B. — "Stable and Migratory Plant Formations." 



Scot. Bot. Review, i., 1912. 



Mosses from the Western Highlands. — By James 

 Stirton, M.D., F.L.S. 



Leucobrywm, pumilv/m (Michx.) has been found at last 

 near Gairloch, Ross-shire, on the 20th of September 1911. 

 Bryologists have searched during a long course of years for 

 this moss throughout Europe and Great Britain, but until 

 lately quite in vain. I have a distinct recollection of hear- 

 ing Professor Schimper of Strasbourg, author of the " Bry. 

 Eur.," while on a visit to this country in 1865, urge those 

 interested in mosses to institute an organised search for a 

 Leucobryum having leaves with deeply cucullate apices. 

 Several in Glasgow directed their attention for twenty 

 years thereafter towards the discovery of such a moss, but 

 without success. In 1882 a Mr. Piffard discovered, in the 

 New Forest, England, L. minus (Hampe), then reckoned a 

 variety of the common L. glaucum (L.), but now named 

 L. albidum (Lindeb.), for what reason I know not. 



