570 report — 1878. 



11. Exhibition of Specimens of Isoetes echinospora. By Alexander Dickson, 

 M.D., Begins Professor of Botany in the University of Glasgow. 



Dr. Dickson exhibited specimens referable to this species -which he had lately 

 found growing on muddy bottom, among Potamogeton, in about two feet of water 

 in Loch Oalkter, Aberdeenshire. The plants were remarkable for the very slender 

 and tapering character of the leaves, which curve outwardly. The macrospores 

 are very markedly echinate, and in diameter about one-fourth smaller than those of 

 Isoetes lacustris. 



12. Some rare Scottish Alpine Plants. By Dr. J. Batlet Balfour. 



Specimens of some peculiar form of Scottish Alpine plants were exhibited — 

 chiefly willows, sedges, and hawkweeds. 



Of the willows, the most interesting was Sadler's willow (Sctli.v Sadleri, Syme). 

 This plant was discovered in 1874 by Mr. Sadler, on the rocks at the head of Loch 

 Kander, Aberdeenshire. Since that date it has never been collected. In August 

 of the present year Mr. Sadler, revisiting Loch Kander, found it in fair abundance, 

 the specimens exhibited being of his gathering. 



Of the other plants that were worthy of notice was Carex frigida, All. This 

 sedge — a novelty in the British flora — was found by Mr. Sadler, in 1874, near the 

 spot where he discovered Salix Sadler ii, Syme. Since then it has not been gathered, 

 until this year Mr. Sadler again obtained some good specimens at the original 

 locality. The chief interest in this plant centres in its being a rare instance of a 

 non-Scandinavian plant inhabiting the Scottish Alps. 



13. Notes on Naiadacece. By Br. J. Batlet Balfour. 



