Nov. 907] Notes Jrom Mycological Literature 266 



Bioletti, Frederic T. 



In a Bulletin (i86) of the California Agricultural Experi- 

 ment Station, February 1907, we find an account of the "Oidium 

 or Powdery Mildew of the vine," — a description of the disease 

 (Uncinula spiralis) and results of spraying. Of the four most 

 serious fungous disease — Peronospora, Black Rot, Anthracnose 

 and Powdery Mildew (or Oidium) — the last only is found in 

 California. Anthracnose is a native of Europe, but the others 

 originated on the wild vines of the eastern and central parts of 

 the United States. The dryness of our climate [says the author] 

 is undoubtedly the cause of our immunity to Peronospora, An- 

 thracnose, and Black Rot, and while Oidium requires less mois- 

 ture than these diseases for its development, it spreads more 

 rapidly and is more difficult to control in a moist atmosphere 

 than a dry one." 



Rea, Carleton. 



Based mainly on the characters of the exoperidium it is told 

 in plain language "How to distinguish the species of British 

 Lycoperda in the field," in a pamphlet of four pages, issued by 

 the British Mycological Society, October 1906. The author sug- 

 gests that George Massee's division of the species into those with 

 rough spores and those with smooth spores is scarcely apropos 

 — and commends Von Bembeke's sections, Asterosporae and 

 Subasterosporae. He disagrees also with C. G. Lloyd's defiinition 

 of Calvatia and Bovistella. 



Thorn, Charles. 



The subject of "Fungi in Cheese Ripening" is discussed 

 at length, as based on the investigation of this author, particu- 

 larly of Camembert cheese and Roquefort cheese. Penicillium 

 camemberti Thom (nomen novum) and Penicillum roqueforti 

 Thom (novem novum) are technically described; and Oidium 

 or Oospora lactis, a cosmopolitan organism, also occupies a con- 

 spicuous place in the report. 



Schrenk, Herman von, and Hedgcock, George G. 



Some experiments to determine whether by wrapping grafts 

 it would be possible to reduce the number of apple trees affected 

 with crown-gall, are reported in Bulletin 100 of the U. S. Depart- 

 ment of Agriculture, Bureau of Plant Industry. Some of the 

 points in the summary are that the disease usually apears at or 

 near the union of the scion and root piece and it is recommended 

 that apple grafts be wrapped with cloth or rubber. 



