222 TRANSACTIONS AND PROCEEDINGS OF THE [Sess. LXVi. 



Ben Lawers, the bare humus descends considerably lower, 

 and as the snow remains for a longer period here than on 

 the other parts of the hill, the small species will be found 

 in good condition on the moist soil after they have become 

 scorched on the south and west sides. Botanists who know 

 only the localities on Ben Lawers for the rarer flowering 

 plants will be disappointed if they search these places for 

 hepatics. Here, as in many other places, it will be found 

 that the poorest localities for phanerogams, and frequently 

 for mosses, are the richest for hepatics, the presence of 

 the latter being, with a few exceptions, almost entirely 

 a question of moisture. 



There appears to be more limestone among the schists 

 of Creag-an-Lochan than on the other hills, judging from 

 the abundance there of some of the species, such as 

 Jungermania Muelleri and Metzgeria pubescens, which prefer 

 this soil. 



I have to express my thanks for assistance with critical 

 plants to Mr. W. H. I'earson, Herrn Kaalaas and Stephani, 

 and Prof. V. Schiffner. 



Plants new to the flora of the British Isles are marked t. 

 I have included all the species from the neighbourhood of 

 which I have seen specimens. 



Frullania Tamarisci (L.) — Common on the low ground ; 

 also common on rocks on the hills, ascending to 3200 ft, 

 F. fra(jilifolia, Tayl. — Frequent on the low ground ; rare 

 on the hills, ascending to Creag-na-Caillich, 2600 ft.; on 

 Ben Lawers, 2700 ft. F. dilatata (L.) — Common on the 

 low ground ; very rare on the hills, and only seen once, 

 at Creag-an-Lochan, 2000 ft. 



Lejeunea serpyllifolia (Dicks.) — Common in ravines ; 

 frequent on the hills, ascending to 3300 ft. L. j^atens, 

 Lindb. — Rare ; Finlarig Burn ravine as an intermediate 

 form between this plant and var. cavifolia, Lindb., of 

 L. ser'pyllifolia. L. calcarca, Lib. — Very rare: on TJuimnium, 

 Finlarig Burn; on rocks, Creag-an-Lochan, 1800 ft.; 

 Cam Chreag, 2700 ft. 



Radula Lindhergii, Gottsche — Frequent on the hills, 

 ascending to 3900 ft., usually with sterile female flowers. 

 R. complanaia (L.) — Common on the low ground ; noticed 

 at Creag-an-Lochan, 2000 ft. 



