152 TRANSACTIONS, NATURAL HISTORY SOCIETY OF GLASGOW. 
Mr. John Renwick exhibited various plants from Ben Lawers, 
Glen Lyon, and Craig Madaidh, a mountain above that glen. 
These included a specimen of Sazifraga oppositifolia, Linn., 
remarkable for having been found in flower so late as 4th 
August. 
Mr. D, A. Boyd exhibited fruiting specimens of various cryp- 
togamic plants from Killin, Perthshire, including Dicranwm 
Suscescens, Turn., Encalypta streptocarpa, Hedw., Meesia uliginosa, 
Hedw., Neckera crispa, Linn., Baeomyces ceruginosus (Scop.), 
Cetraria aculeata (Schreb.), and Parmelia tristis (Web.). He 
also showed barren specimens of Habrodon Notarisii, Schpr., 
from the same district. 
Mr. Boyd also submitted specimens of Urtica wrens, Linn., 
affected with Peronospora urtice, Lib., a parasitic fungus. These, 
he stated, had been gathered at Troon during the Society’s recent 
excursion to that town. The fungus does not seem to have 
hitherto been recorded for the West of Scotland. Its presence 
may, however, be readily detected, as, owing to the action of the 
mycelium, the portions of the leaves affected with the parasite 
become much paler in colour than the surrounding tissue. Spore- 
bearing threads are produced abundantly on the lower surface of 
the pale spots. 
Mr. Peter Ewing submitted a report on the state of alpine 
vegetation during the month of July, as observed by him on Ben 
Lawers, Meall Ghaordie, and Ben Laoigh. 
Mr. Ewing also read a paper on “ Ranunculus Flammula, Linn., 
and its Forms,” which was illustrated with an extensive series of 
specimens. 
Mr. John Renwick read a paper entitled ‘‘ Notes on a Visit to 
Roxburghshire and Berwickshire,” in which he made some remarks 
on the botany and geology of these districts, and described numerous 
large trees which had been measured last July. The finest of 
these were the following :—Near Jedburgh, (1) the celebrated 
Oak (Quercus Robur), known as the ‘Capon Tree,” girthing 
22 ft. 62 in. at 5 ft. 9 in. on north-east, and 3 ft. 9 in. on south- 
west ; the trunk divides at 6 ft. into two, the northern part being 
the larger, and girthing 16 ft. 24 in. at base; spread of branches, 
97 ft. 2 in.; leaves petioled, and fruit nearly all pedunculated. 
(2) An Alder (Alnus glutinosa), 12 ft. 9 in. at ground, dividing 
