Floristik, Geographie, Sj'^stematik etc. 207 



tered waters of the estuary, and as they have arisen successively , 

 they present all stages ot ^tabilisation of material and of plant 

 communities. Sand dunes are more extensively developed than is 

 usual on shingle banks. The salt marshes occur on the lee side of 

 the Point, some are still mobile mud but occupation by halophytes 

 may be studied in all stages, especially where the lateral shingle 

 banks are clustered together so as to form creeks. 



The plant communities are dealt with only generally, as larger 

 contributions are in progress. W. G. Smith. 



Sargent, O. H., Drosera ntacrantha and D. stricticaulis. (Journ. 

 Bot. LI. p. 33 -42. 1 pl. Feb. 1913.) 



Hitherto Drosera stricticaulis has been considered a variety of 

 D. macrantha, after careful study the author is satisfied that it is 

 entitled to specific rank. The morphological differences between the 

 two species are given in tabular form foUowed by the life histor^' 

 of both plants. M. L. Green. 



Smith, W. W., A new Leycesteria. (Trans, a. Proc. Bot. Soc. 

 Edinburgh. XXIV. p. 173-175. 1913.) 



The author describes as a new species L. Belliana from Sik- 

 kim allied to L. sinensis, Hemsl. The description is accompanied 

 by a plate showing a flowering branch (natural size) and flower 

 dissections (enlarged). W. G. Craib (Kew). 



Smith, W. W., Bortwickia, a new genus of Capparidaceae. 

 (Trans, a. Proc. Bot. Soc. Edinburg. XXIV. p. 175—176. 1913.) 



Under the name Bortwickia trifoUata (gen. et sp. nov.) is de- 

 scribed a shrubby Capparid from Burma which, although shrubby, 

 the author regards as allied to Polanisia. A plate showing habit 

 and flower dissections accompanies the article. 



W. G. Craib (Kew). 



Ward, F. K., On the altitudinal limits of plants in North- 

 west Yunnan. (New Phytologist, XI. 9. p. 333—346. 2 pl. 2 figs. 

 1912.) 



In this region the Vegetation changes abruptly, apparently 

 without relation to altitude, and the author gives some observations 

 on Controlling factors. The deep south to north gorges of the Sal- 

 ween, Mekong, and Yangtze rivers are separated by narrow 

 mountain ridges rising to 4000 metres. The influence of the S.-W. 

 monsoon produces a diminishing rainfall from W. to E., so that the 

 Salween Mekong divide has a high rainfall and a low snow-line 

 (5000 m.), whereas the Yangtze divide is much drier, and the 

 snow-line is 6000 m. The latter ridge shows 5 zones: 1) Forest-belt 

 of Ahies, Querciis, Larix, etc.; 2) shrub-belt of Rhododendron, Rosa, 

 etc.; 3) belt of dwarf Rhododendron] 4) alpine grassland with Pri- 

 rnula, Saxi/raga, Gentiana; 5) open formation on rock-detritus. The 

 Salween-Mekong ridge is more densely forested and shows addi- 

 tional formations (Alnus-forest and alpine meadow). These zones are 

 illustrated in a diagram. 



The Chief formations are ascribed to the distribution of the 

 Summer rains of the S.-W. monsoon, but within more localised 



