Palaeontologie. — Eumycetes. 327 



Long (Se-Tschuen), ä 25 kilometres au Nord de Ning Yuan 

 Fou, et enfin Lang Pa Pou, dans le Yunnan, ä une cerlaine 

 distance au Nord-Ouest de Yunnan-Fu, entre 26° et 25° de 

 latitude. 



L'etude de ces empreintes a permis ä Pelourde d'y recon- 

 naitre les especes suivantes: Schisoneura Carrerei ä Liao Kao 

 Chao, Cladophlebis nehhensis et Dictyophyllum sp. ä Cha Koan 

 Tchang, Podosamites cf. distans ä Litze Pin et ä Ki Long, et 

 Pterophylhim sp. ä Lang Pa Pou, cette derniere espece represen- 

 tee seulement par un fragment de rachis muni d'une courte pinnule 

 relativement large indiquant vraisemblablement la region inferieure 

 d'une fronde. 



Ces differentes especes, abstraction faite de la derniere dont on 

 ne peut tirer de conclusion precise, permettent de rapporter ces 

 quelques gisements, du moins ceux du Se-Tschuen, ä l'etage 

 rhetien, dejä reconnu par Ledere sur divers points situes au 

 Sud-Est de la region exploree par le Dr. Legendre. Le Ptero- 

 phyllum de Lang Pa Pou peut appartenir egalement ä la flore 

 rhetienne; il permet en tout cas d'attribuer ä cette localite un äge 

 secondaire. R. Zeiller. 



Conel, J. L., A study of the brown-rot fungus in the 



vicinity of Champaign and Urbana, Illinois. (Ph3'topa- 



thology IV. p. 93—101. 1914.) 



Since Woronin divided (1899) the brown-rot fungus into two 



species, many investigators have concluded ihdit Sclerotinia fructigena 



does not occur in the United States and that the species in this 



country is ^S". cinerea. The studies, made by the writer in Illinois 



about the germination of conidia, the color of conidial tufts, the 



date of appearance of conidia and apothecia in spring, the characters 



of asci and ascospores and inoculation experiments, have led him 



to the conclusion that the Sclerotinia of this locality is 5. cinerea 



and for the following reasons: 



1. While the conidia showed a considerable Variation as to 

 vitality, the results are nevertheless clearly positive. The fact that 

 a considerable number of conidia germinated after passing through 

 the Winter indicates that the species is 5. cinerea. 



2. The color of the conidial tuft (ashen-gray) is the same as that 

 ascribed to the tufts of S. cinerea by other workers. 



3. The size of the conidia (13.3 X '7-6 /^) is essentially that 

 reported by Woronin (12.1 X ^•^) ^^^ ^- cinerea. 



4. The date of appearance of the conidial tufts in the spring' 

 (during the flowering season of stone fruits) is unlike the condition 

 found by Ewert for 5. fructigena and like that in S. cinerea. 



5. The appearance of the apothecia when the flowers of stone 

 fruits are in füll bloom, and hence in condition to be easily infected 

 by the ascospores, as well as the persistence of the apothecia during 

 the flowering season only. would suggest that the form here is the 

 one which attacks stone fruits primarily, viz. 5". cinerea. This evi- 

 dence is not of much weight for the reason that some pome fruits 

 bloom at the same time as stone fruits. Nevertheless, it is true that 

 in two orchards apple trees which are very near severely infected 

 plum trees show no signs of infection. 



6. The shape of the ascospores is unlike that described by 

 Ad er hold for 5. fructigena and like that described b}'- others for 

 5. cinerea. 



