Notes and Brief Articles 



37 



A disease of Carolina poplar seedlings due to Pleococcum 

 populinum is discussed by A. Bertin in Vie Agr. et Rurale, p. 

 292. 1 91 8. The fungus enters readily through wounds, and may 

 be controlled by spraying the young trees with Bordeaux mixture. 



Citrus canker is reported by E. M. Doidge to occur in several 

 places in South Africa, having been introduced from Japan on 

 Citrus trifoliata stock. This most serious of citrus diseases has 

 also appeared in Australia, the Philippines, and the Southern 

 United States. 



A popular sketch of the life and work of Elam Bartholomew 

 appeared in the American Magazine for November, 191 9, con- 

 tributed by E. F. Tinker. A good photograph of Mr. Bartholo- 

 mew, as he now appears at the age of sixty-six, accompanies the 

 article. 



The common field mushroom, Agaricus camp ester, was notably 

 scarce last season in the vicinity of New York, doubtless owing 

 to the unusually rainy weather. Did the mycelium fail to de- 

 velop or did it develop so copiously that it failed to fruit? Were 

 light and heat major or minor factors? It must be remembered 

 that fungous mycelium requires oxygen just as any other grow- 

 ing plant. 



A specimen of the rare Anthurus borealis Burt was brought in 

 by Mr. Boynton on October 31, 1919, from the Gladiolus bed in 

 the Garden grounds, where the students of the Garden School 

 discovered it. This interesting stinkhorn is divided at the top 

 into six narrow, hollow arms. It was first brought to our atten- 

 tion in May, 191 1, by Dr. F. M. Bauer, who found it growing in 

 quantity in mushroom beds on Blackwell's Island. So far as 

 known, Mr. Boynton's specimen is the first ever collected within 

 the New York Botanical Garden. 



Gum formation in its relation to Cankers is discussed by Hig- 

 gins in Bulletin 127 of the Georgia Experiment Station. The 



