Yorkshire Naturalists at Dent. 277 



In Scotcher Ghyll the following additional species were noted : — 

 Collema pulposum, on calcareous debris in the vicinity of the falls. 



Baeomyces rufus, on sandstone boulders stream-side. 



Cladonia macilenta, on rotten stumps. 



C. gracilis var. chordalis, amongst heath vegetation at the head of the 

 ghyll. 



•C squamosa, amongst mosses. 



Ramalina farinacea, on ash tree boles. 



Usnea florida var. hirta, on boles of ash and mountain elm. 



Pertusaria Wulfenii, on boles of ash. 



Peltigera canina, on moss-covered rocks. 



P. rufescens, and f . praetextata, on moss-covered rocks. 



Lecanora Hageni, on an oak tree bole. 



■Gr aphis scrip ta, on boles of sycamore. 



Lecidia parasema, on boles of ash. 



At the head of the ghyll, amongst a dwarf ed heath association of plants, 

 occur Cladina sylvatica and C. uncialis. 



Whemside, both through Blake Ghyll on the ascent of the northern 

 shoulder, and also by way of Gable Rake on the Deepdale side, was in- 

 structive. The lichen flora of this Yorkshire mountain has, to a great 

 extent, been recorded by the late Wm. West, and reference can be made 

 to the pages of Lees' ' Flora of the West Riding.' The following species, 

 however, do not appear previously to have been recorded for Whemside : — 



Cladonia cervicornis, on the peat, rock ledges, top of Black Ghyll. 



C. coccifera, on the peat, under Ling. 



C. flabelliformis and var. coronata, amongst mosses, Blake Ghyll. 



C. Floerkeana, on the peat. 



Gyrophora polyrrhiza, on gritstone blocks, Deepdale side. 



Cetraria aculeata f . hispida, amongst rock outcrops, Deepdale side. 



Lecanora polytropa, on gritstone blocks, Deepdale side. 



Phizocarpon geographicum and var. atrovirens, do. do. 



P. confervoides, do. do. 



Lecidia lithophila, sandstone boulders, Blake Ghyll. 



i. granulosa, on the peat. 



L. uliginosa, do. 



Noticeable was the abundance of Cladina sylvatica amongst the heath 

 vegetation beyond the tarns, its luxuriant growth in places making it 

 one of the most conspicuous features of the flora. 



Fungi. — One of the writers (F.A.M.) is responsible for the notes 

 under this heading and for the list of fungi which is appended. The 

 agarics were all common species, and with the exception of Pluteus 

 cervinus and Hypholoma fasiculare, they were found on the lower slopes 

 of Whernside, as well as in the immediate neighbourhood of Dent. An 

 observation with regard to the vertical range of three of our commonest 

 species may be recorded. Up to 1,500 ft. Tubaria furfuracea , Stropharia 

 semiglobata and Anellaria separata all occurred frequently, but beyond 

 that limit only 5. semiglobata persisted, and specimens of this fungus 

 were gathered at the summit of Whemside at 2,400 ft. 



Nothing was seen of Melampsora arctica Rost. which occurs on Salix 

 herbacea. This parasitic fungus has so far only been found in the British 

 Isles on Ben-an-Doaih at an altitude of 3,100 ft., but where its host is 

 plentiful the fungus is likely to be found, and future visitors to this 

 station of 5. herbacea will do well to bear in mind this possibility. 



The luxuriant herbage at the foot of Great Blake Ghyll and on the 

 banks of the Dee yielded all the Uredines. The Pyrenomycetes, most of 

 which have been identified by Sir Henry Hawley, were collected in the 

 hedgerows near Dent. 



A quantity of paste that had been thrown into a cottage midden 

 was covered with a green mould which proved to be, Peuicilium expansuw. 



1921 Aug. 1 



