130 TRANSACTIONS—PERTHSHIRE SOCIETY OF NATURAL SCIENCE. 
Carex vesicaria^ L., also grew in the dam. It appears to be very 
local in the north-east of Scotland. 
Molinia coei^uka, Moench, was noteworthy on account of the 
extreme range of variation that it presented, from examples of not 
more than four inches in height, with a few dark spikelets, on the 
more barren spots on heaths and waste places, to others growing in 
luxuriant clumps in the shade of woods. The flowering stems of the 
latter reached a height of three feet occasionally, and bore many 
spreading branches with pale greenish spikelets. 
Cryptogams. 
Riccia fluita7is, L.—This grew in plenty in the dam, both floating 
in small masses in the water, and creeping on the damp mud on those 
parts of the bottom and of the sloping sides that were above water. 
Fungi.—O f this group of plants I picked up a few species, but 
shall mention here only certain parasites on flowering plants. 
Peronospora violacea, Berk., was found near Murthly on the flowers 
of Scabiosa arvensis, causing them to become enlarged and dull in hue, 
and to remain sterile. This fungus has not previously been recorded 
from Scotland. 
P. densa, Rabh., on Rhinanthus Crista-galli, P. Ahimarum^ Casp., 
on Stellaria media, P. obovata, Bon., on Spergula arvensis, and 
P. alta, Fckl., on Plantago major, are all new records for the basin 
of the Tay, so far as I am aware, though already known as Scotch. 
Ustilago Scabiosce, Sowerby, was not scarce in the anthers of 
Scabiosa arvensis. It has not, I think, been recorded from Perthshire. 
The allied U. jiosculorum, D.C., recorded by Dr. White from 
Rannoch, was also not rare, infesting the anthers of 6'. Succisa. 
Taphrina camdescens, M. and D., was found on Oak leaves, 
causing spots, discoloured and prominent above, concave and at 
first pale below, where the asci are formed after a time. This 
obscure parasite, though not previously recorded from Scotland, is 
not rare in various districts from Perth to Aberdeen. 
Galls. 
Of these the only forms that call for special mention, with one 
exception, are the work of the microscopic Gall-mites {Phyfoptidce), 
since the few other galls met with have all been already recorded 
by me from Perthshire. For convenience the galls are enumerated 
in the order of the plants on which they occur. 
Ornithopus perpusillus.—h\ a field of grass, allowed to have 
relapsed almost into its natural condition, in Caputh, this plant was 
very plentiful, but almost every specimen was more or less altered 
