Keswick Lichens. H. H. Knight. 



II 



There are two t\-pe5 of rock aroiind Kes\\ick, the \-olcanic rocks 

 to the south of the to%\Ti, and the slates of Skiddaw and the 

 hills round Bassenthwaite. The hard volcanic rocks are the most 

 suitable for Lichens, the slate rocks not producing so many 

 Sf)ecies. As there is no hmestone, many common Lichens are 

 absent from the hst. Miss Noel sent three Lichens from Shap 

 in the neighbouring county of Westmorland where the car- 

 boniferous limestone occurs. These are included in the hst. The 

 Lichen parasites Ticotheciitni gemmiferum Koerb. and T. er- 

 raticum Massal. were found, the former being common. I am 

 much indebted to ^Mr R. Paulson for help in making out this Hst. 



Calicium hj-perellum Ach. 

 Sphaerophorus globosus Wain. 

 S. fragilis Ach. 

 Ephebe lanata Wain. 

 Leptogium lacerum S. F. Gray. 

 Parmeliella plumbea Wain. 

 Pannaria rubiginosa Del. 



var. conoplea Koerb. 

 Peltigera canina Willd. 

 P. rufescens Hotfm. 



var. praetexta Xyl. 

 P. polydact\-la HoflFm. 

 P. horizontalis Hoffm. 

 Sticta fuliginosa Ach. 

 Lobaria scrobiculata DC. 

 L. laetevirens A. Zahlbr. 

 L. pulmonaria Hofifm. 

 Parmelia physodes Ach. 

 P. perlata Ach. 

 P. caperata Ach. 

 P. scortea Ach. 

 P. saxatilis Ach. 

 P. sulcata Ach. 

 P. dubia Tayl. 

 P. revoluta Floerke. 

 P. conspersa Ach. 

 P. omphalodes Ach. 

 P. fuUginosa Xyl. 



\-ar. laete\Trens Xyl. 

 Cetraria glauca Ach. 

 C. aculeata Fr. 



f. liispida Cromb. 

 Evemia prunastri Ach. 

 E. furfuracea Mann, Shap. 

 Ramalina cahcaris Ach. 

 R. farinacea Ach. 

 Usnea florida Web. 



var. hirta Ach. 

 Alectoria jubata Ach. 

 Xanthoria parietina Th. Fr. 

 X. lychnea Th. Fr. 

 Placodium ferrugineum Hepp. 



var. festivum A. L. Sm. 

 Candelariella \-itellina Muil.-Arg. 

 Physica pulverulenta Xyl. 

 P. grisea A. Zahlbr. 



Ph}-sica hispida Tuckerm. 



Rinodina demissa Am. 



R. subarenaria A. L. Sm. 



Lecanora subfusca Ach. 

 var. chlarona Ach. 



L. atra Ach. 



L. paUida Schaer. 



L. subcamea Ach. 



L. varia Ach. 



L. symmictera Xyl. 



\-ar. aitema Xyl. 



L. sulphurea Ach. 



L. polytropa Schaer. 



L. argopholis Ach. 



L. badia Ach. 



L. atriseda Xyl. 



L. tartarea Ach. 



L. subtartarea Xyl. 



L. parella Ach. 



L. cinerea Sommerf. 



L. gibbosa Xyl. 



L. subdepressa Xyl. 



L. superinscula Xyl., a form with 

 larger spores than hitherto de- 

 scribed. 



L. lacustris Th. Fr. 



L. Dicksonii Xyl. 



L. epulotica Xyl., Shap. 



Acarospora fuscata Th. Fr. 



Haematomma ventosum Massal. 



Pertusaria faginea Leight. 



P. lactea Xyl. 



P. pertusa Dal. Tor. and Samth. 



P. dealbata Cromb. 



P. leioplaca Schaer. 



P. Wulfenii DC. 



Diploschistes scruposus Xorm. 



Baeomyces rufus DC. 



B. roseus Pers. 



Stereocaulon evolutum Graewe. 

 S. denudatum Floerke. 



var. puh-inatum Th. Fr 

 Cladonia rangiferina Web. 



C. sylvatica HoSm. 

 C. uncialis Web. 



C. foUacea Willd. 



