250 Prof. Dr. C. Meresclikovsky's Diagnoses 



Spec. orig. (1) in herb. Conservat. botau. Genevae, (2) in 

 ]\Iereschkovsky, Licli. ticin. exs. no. 82. 

 Geneva (Helvetia). 



Forma velutina, Mer. 



Mereschkovsky, Coutrib. lich. Vladimir Arbeiten (Trudy) d. Naturf.- 

 Ges. Univ. Kazan, 1911. 



Pars centralis thalli ob iridic denso velufcina. 



Spec. orig. in herb, nieo Kazani. 

 Rossia Media. 



Parmelia physocUs, forma compacta, Mer. 

 Mereschkovsky, Beitr. Kenntu. Fleclit. Unigeg. Revals, Kazan, 1909. 



Thallus compactus, laciniis mutuo pressione longitudinaliter siib- 

 carinatis, centre irregulariter contortu-plicatis. 



Spec. orig. (numeros.) in herb, nieo Kazani. Spec, a Long 

 missum hand optimum. 

 Esthlandia, Fennia. 



Forma elegans, Mer. 



Mereschkovsky, Contrib. fl. lich4uol. Kazan', Hedwigia, 1919, p. 97, 

 tab. ii. figs. 3, 4. 



Thallus rosulas 1-5-5 centim. latas formans, tenuiter elegantiorque 

 dissectus, incisiones foraminas rotundas formans. 



'Spec. orig. (numeros.) in lierb. meo Kazani. 

 Ad saxa areuacea in Fontainebleau (Gallia). 



Forma pinnata, Mer. 

 Mereschkovsky, Addit. Lich. Roasise, i., Oesterr. Botan. Zeitscbr. 1921. 



Thallo euperne albido, nitidiusculo, lobis planiusculis, angustioribus, 

 discretis, pinnatiforme dissectis a forma typica valde differt. 



Spec. orig. in herb, meo Kazani. 

 Sibiria. 



Forma vittaloides, Mer. 



Mereschkovsky, Nachtr. Flechtenl. Umgegend. Revals, Kazan, 1913; 

 id. Contrib. fl. lichen, envir. Kazan, Hedwigia, 1919, p. 197, tab. ii. 

 tig. 2. 



Thallus effusus, rosulas nondum formans, laciniis valde discretis, 

 laxe ad substratum affixis, subimbricato-superpositis, angustis. 



