Palaeontologie. — Eumycetes. 235 



species in Europe and one in Manchuria. Leaves suggesting the 

 genus have been found in the middle Cretaceous. During the whole 

 tertiary period it is a common member of the flora in America 

 and in Europe, also in Greenland, and on the Saghalin Island. 

 It still occurred in the Pleistocene of Europe. The only european 

 species now occurs in natural conditionsin Greece and Asia. It 

 is clear, that the distribution of this genus has been greatly influenced 

 by the ice age. 



Oreomunnea and Engelhardtia for the purpose of the palaeo- 

 botanist may be considered as identical. Engelhardtia now occurs 

 in Southeastern Asia and the monotypical genus Oreomjninea 

 in Central America. The oldest known european form occurs in the 

 Upper Eocene or lower Oligocene of France, and the genus was 

 abundant in southern Europe during the upper Oligocene and 

 Miocene and species of late Miocene and early Pliocene age are 

 recorded from Spain, France, Croatia and Hungary. The only 

 described species from America occurs in the lower Eocene (Wilcox 

 group) of northern Mississippi, however some other species (not 

 yet described) have been discovered in the middle Eocene (Claiborne 

 group) of southern Arkansas. 



The genus Pterocarya is as to P caucasica now confined to u 

 limited area in Trans Caucasus, another species occurs in northern 

 China and one or two others in Japan. The fossil fruits are 

 perfectly characteristic. The oldest known fossil species is recorded 

 from the Tertiary of Colorado, another american record is from 

 the early Pleistocene but this is not based on positively identified 

 material. In Europe the records commence with the Oligocene, 

 and the genus was abundant during the whole tertiary period. 

 The Pliocene species are numerous and abundant and are found 

 all over southern Europe and not rare in the central parts. But 

 they were apparently exterminated during the glacial period. It is 

 also known from the Altai mountains in the earlj'^ Pleistocene 

 (P. caucasica). 



The genus Platycarya is monotypic. This species is a small 

 tree of Japan and northern China. No fossil remains of this genus 

 have been discovered, and this is probablj^ due to the fact that the 

 vast continent of Asia is practically unexplored. Jongmans. 



Klebahn , H., Beiträge zur Kenntnis der Fungi imperfecti . 

 (Mykol. Centralbl 3. p. 49—66. 97—115. 1914.) 



Auf Dahlien trat eine Pilzkrankheit auf, die sich durch rasches 

 Welkwerden der anscheinend gesunden Pflanzen äusserte. In den 

 Gefässen der Knollen wurde Myzel beobachtet. In den Blättern 

 fanden sich Sklerotien und auf den Blättern Konidienträger der 

 Gattung Verticillium . Reinkulturen zeigten ein lippiges weisses 

 Myzel mit Konidienträgern. Sklerotien bildeten sich ebenfalls und 

 zwar durch Teilung und Aussprossungen einer Zelle Dies führte 

 zu Coniothecium'A\iVi\\chen Zellhaufen. Infektionsversuche gelangen 

 nur einmal. Der neue Pilz wird Verticillium Dahliae genannt Er 

 unterscheidet sich durch kleinere Konidienträger, durch das \'or- 

 handensein der Sklerotien und durch das Fehlen der Dunkelfär- 

 bung an der Basis der Konidienträger von Verticillium alboatrum . 



Auf Darlingtonia californica trat eine Gloeosporium-AVi auf, welche 

 das grüne Gewebe und die Kannen beim Befall rasch zum Abster- 

 ben brachte. Die neue Art wird Gloeosporiurn Darlingtoniae genannt. 



