248 Prof. Dr. C. Mereschkovsky's Diagnoses 



Spec. orig. (numeros.) in herb, meo Kazani. 

 Esthlandia, Reval. 



Ramalinn popii^ina, forma Jax'uiscula, Mer. 



Mereschkovsky, Nachtrag zur Fleclitenl. Umgeg. Revals, Kazan, 1913 ; 

 id. Contrib. fl. lich. Crimee, Ann. d. Sc. nat. Botanique, 1921 (cum 

 fig.)- 



Thallua ut iu typo, sed laciiiiis magis laxiusculo dispositis. 



Spec. orig. in lierb. meo Kazani. 

 Esthlandia, Tauria. 



Evernia thamnodes, iovm^i furfurascens, Mer. 

 Mereschkovsky, Contrib. fl. lich. envir. Kazan, Hedwigia, 1919, p. 193. 



Thallus obscurior, cyanescente-viridis, dense isidiis elongatis sore- 

 diosisque omnino obtectus. 



Spec. orig. (numeros.) in herb, meo Kazani. 

 Kazan (Rossia Media). 



Forma parva, Mer. 



Mereschkovsky, Contrib. lich. gouv. Vladimir, Arbeit. (Trudy) d. 

 Naturforschges. Univ. Kasan, 1911 ; etiam in liedyt^igia, 19J 9, p. 193. 



Thallus parvus, altitudine circiter 1-2 centim. 



Sjjec. orig. (numeros.) in herb, meo Kazani. 

 A form analogous with the forma mimitissimaj Mer., of 

 Usnea hirta, with which it is often associated. 

 Kossia Media. 



Forma subnuda, Mer. 



Mereschkovsky, Contrib. fl. lich. envir. Kazan, Hedwigia, 1919, p. 193. 



Thallus Isetior, stramiueus, levis, esorediosus vel vix sorediosus. 



Spec. orig. in herb, meo Kazani. 

 Comparanda cum forma esorediosa, Hue. 

 Rossia Media (Kazan) et Sibiria. 



Cetrarla crispa, forma albinea, Mer. 

 Mereschkovsky, Addit. Lichenogr. Eoss. i., Oest. Botan. Zeitschr. 1921. 



Thallus erectus vel suberectus, coespitosus, baud vel parce crispus, 

 albidus, subtus interdum passim albus, basin versus fulvescens. 



Spec. orig. iu herb, mto Kazani. 

 Sibiria. 



