LICHEHOLOGICAL MEMORABILIA. 173 



tion of the value of chemical reagents in accurately determining 



tin 1 Bpecies of lichens. 



The following additions to the synonymy may be useful : — 

 Lecidea DHleniana (Ach.) ( K yellow, C orange). 



Geog. distrih. : — Sweden, Italy. 



Exs.— Leight, 336. Mudd, 199. 



Opegrapha grumulosa, Duf. | ' K faint yellow, C red). 



Exs.— Zw., 142, 9, 144. Anzi Langob., 404. Anzi Venet, 

 82, 83. Schaer., 580. 



England. — New Red Sandstone Rock, South Devon! Prof. G. 

 Dickie. 



As details of the two lichens have not been published, it may be 

 advisable to introduce them here : — 



Explanation of Plate xxvi. 



Lecidea DHleniana (Ach.).— a. Section of apothecium. 6. Spores magn. 1,200 

 times. 



Opegrapha grumulosa, Duf.— c. Section of apothecium. d. ""pore magn. 

 1,200 times. 



SOME CRYPTOGAMS FROM PIEDMONT AND NICE. 



With a view to draw tourists' attention to new ground, the follow- 

 ing slight notice of a few rarities is given, as the habitats of some 

 do not appear to be localized. Collected in a hasty journey, one is 

 induced to believe other noteworthy plants would be found in this 

 region, the beauty of whose scenery and climate ought alone to 

 induce a visit. 



Collema Stygium. (Belhr.) Krempelh. Bay, p. 94. Synechoblastus 



Kdrb. Parer. p. 418. 



On elm and walnut, Cuneo (Coni) to Robillante. I have received 



this (Saxicole) from Mr. Joshua, Cirencester. Professor Anzi, in 



his " Neosymbola Licli. Rarior. vel. now Italic Superioris, Milano, 



180G, gives following habitats for this : — 



" On limestone and dolomite in the Grisons Valleys, Lanzada 

 Poschiavo." 



Rhynchostegium piaecox. Ih Not. Epilogo, p. 81. Ewrhynehium 

 Strigosum /3 abbreviation, B. B. " Montibus di Tenda, sterile," Epilogo. y;. 81. 

 A dense species, occurring on the Limone side of Col di Tenda, 

 forming patches like the dense state of Brachythecium Collinum, 

 B.E., fertile June, 1873, in turfy hollows, wet with snow water, 

 although the Col is only some 6000 feet high. 



Desmatodon obtusifolius. D.N. Epilogo, p. 576. D. flamcon*. B;B. 



" In Montibus di Tenda, secus viam, Julio, 1839, legit celeb. 

 cesati." What appeared to be this, but old and barren, was by 

 road side on south-west side of summit of Col. Being out of 

 season, one could only judge from the obtuse leaves that resemble 

 the American specimens of true V.flavtcans. 



