330 Fungi. — Pathologie 



a careiul search extending over ten years or more. Then it assunied 

 its usual epidemic character and spread over several of the southern 

 counties in a short time At present the blight is found in a large per- 

 centage of the leading pear orchards oi southern California ana oi the 

 San Joaquin and Sacremento Valleys. Certain districts are wholly or 

 nearly free from it. In California there is not only a spring and summer, 

 but also a fall and winter epidemic of the blight. The latter is the most 

 destruetive and has been proven to be identical with the spring blight in the 

 east. The winter blight rarely attacks the tree above the height of a man's 

 head; it attacks the large limbs and trunk rather than the twigs This 

 is the most vital part of the tree as the diseased limbs cannot be cut out 

 without cutting the whole tree. For this reason the winter blight is often 

 more destruetive than the spring form in the east. The infection takes 

 place about the time of harvesting the crop and continues in a most 

 active State through the months of November, December and January. 

 It may oeeur where the spring form has apparently not been. The 

 infections mostly oeeur in short spurs developed on the bases of the 

 main limbs and on the trunk itself. The infections are made in the 

 blossoms and on the vegetative tips by bees visiting the flowers for their 

 honey and the young buds for their waxy coating. In this way the 

 spores are carried from tree to tree. Field observations showed that the 

 near proximity of large colonies of bees to pear-orchards greatly in- 

 creases the danger and hastens the destruetion of the pear trees. 



Perley Spaulding. 



Pennington, M. S., Uredineas recoleetadas en las islas 



del delta del Paranä. (Anales de la Sociedad Cientifica 



Argentina. LIII. p. 263—270. June 1902.) 



Contains the following new names : Puccinia melanosora tigrensis, 

 Uredo Paranensis. Trelease. 



RECHINGER, C, Ueber ein seltenes Phytoptocecidiiim a u f 



A rtemisia camp est ris L. und seine Aehnlichkeit mit 



Filago arvensls L. (Verhandlungen der zoologisch-botanischen 



Gesellschaft in Wien. LH. 1902. p. 152—153.) 



Die Vergällung besteht in einer Vergrünung und Vergrösserung der 

 Blüthen, verbunden mit Verzögerung des Wachsthums des ganzen 

 Blüthenstandes. Die Anzahl der Blüthen ist sehr vermindert, der ganze 

 Blüthenstand massig zusammengezogen und dicht weiss filzig behaart. 

 Verf. beobachtete in dieser Gallenbildung eine grosse Aehnlichkeit mit 

 den dort ebenfalls häufig vorkommenden Filago arvensis L. und erklärt 

 sich diese Nachahmung der Gallenbildung als Schutz gegen den Angriff 

 seitens der Vögel und der Insecten, indem die nachgeahmte Art den 

 Thieren keinerlei gesuchte Speise bietet in Folge der trockenen häutigen 

 Anthodialschuppen und der kleinen dürren Achenen. Die Fundstelle ist 

 Wachau in Niederösterreich. v. Dalla Torre (Innsbruck). 



SHEAR, C. L, My cologi cal Notes antl'iNew Species. 

 (Bulletin of the Torrey Botanical Club. XXIX. 1902. p. 449 

 —457.) 



The writer compared Fusicladium fasciculatum C. and E. and 

 Scolecotrichum euphorbiae Tracy^and Earle and deeided that they are the 

 same thing. 



It should be designated Scolecotrichum fasciculatum (C. and E.). 

 He also deeides that Lachnum Engelmanni Tracy and Earle is identical 

 with Peziza (Dasychyphae) arida. 



The following new genera and species are also given: 



Cryptoporus gen. nov. with the species C. volvatus (Beck.) as 

 a type. 



