Fungi, Myxomyceten , Pathologie. 625 



Aecidium elatiniun, Trichosphaeria parasitica etc.) auf dieser weit 

 ausserhalb des Verbreitungsgebietes der Tanne liegenden Insel. 



Neger (Tharandt). 



Neger, F. W. und W. Dawson. Ueber Clithris quercina Pers- 

 (Rehm.) (Annales mycologici, V. p. 214—220. 1907.) 



Die Frage ob der in Eichenschonungen häufig auftretenden 

 Clithris quercina eine praktische Bedeutung als Parasiet zukommt, 

 wird, wie folgt, entschieden: 



Vorzugsweise nur an unterdrückten Zweigen auftretend, vermag 

 der Pilz daumendicke und kräftigere Aeste zu töten, indem er meist 

 von oben nach unten fortschreitend bis an die Astbasis vordringt. 

 Die Infection erfolgt aber nicht an gesunden unverletzten Zweigen, son- 

 dern meist nur an toten Trieben (oder nach Insektenfrass). Der Pilz 

 hat dennoch nur die Bedeutung eines Wundparasiten, vermag zwar 

 vom abgestorbenen in das gesunde vorzudringen , ist aber belanglos 

 für Zweige, welche sich in günstigen Lebensbedingungen befinden. 



Neger (Tharandt). 



Peck, C. H., Report of the State Botanist for 1906. (Bull. 

 NO. 116, New York State Museum. 1907.) 



The report of the State Botanist deals with the following topics: 



Species added to the herbarium. 



A list of species hitherto not reported from New York State. 



In this list, the following new species are described: 



Anianitopsis pulveKulenta , Boletus siihpunctipes , Collybia campa- 

 nella, Cortinarius validipes, Crataegus hahereri, Crataegus novebora- 

 censis, Entoloma ini^ius, Flamniula expa}isa, Hygrophoriishurnhami , 

 Marasmius phyllophilus, Mycena alhogrisea, Omphalia pusillissima , 

 Panicum diminiitivum , Peckiella hymenii, Pleurotus terrestris, Tri- 

 choloma hirtelluyn. 



A list of species of fungi from regions near New York State. 

 In this list one new variety is given; viz., Xylaria polymorpha com- 

 binans. This is followed by a series of notes on various fungi 

 reported from New York State. In this list one new species is 

 described; viz. Russula pectinatoides. 



An extended account of the New York species of Hygrophorus 

 then follows. The author gives a synoptic key of the subgenera, 

 recognizing three subgenera: Hygrocybe , Camarophylliis and Linia- 

 cium. A key to the species then follows and each species is then 

 described in detail, 



Peck makes several changes in the names of the species ot 

 HygropJiorus, viz. Hygrophorus rubropunctus , n. nom.; Hygrophorus 

 burnhamij n, sp.; Hygrophorus basidiosus, n. comb. 



The report continues with a discussion of the New York species 

 of Russtda. After a description of the genus, a key to the subgenera 

 follows and under the separate subgenera keys to the species. Peck 

 recognizes five subgenera: Compactae , Furcatae, Rigidae, Hetero- 

 phyllae and Fragiles. The following new species are described: Rus- 

 sula modesta, n. sp.; Russtda squalida, nom. nov.; Russula foeten- 

 tula, n, sp. 



Attention is called to the fact that in all of the descriptions of 

 the species of Hygrophorus detailed descriptions in each individual 

 species are given with spore measurements. X number of the spe- 

 cies described are figured on six plates. H. von Schrenk. 



Botan. Centralblatt. Band 105. 1907. 40 



