122 

 TWEXTY-FIRST VOLUME OF "NATURAL FAMILIES 



OF Plants" Appears 



Engler, A.: Die natiirlichen Pflanzenfamilien. ii Band, Musci 

 (Laubmoose) 2 Halfte redigiert von V. F. Brotherus und 21 Band, 

 Parietales und Opuntiales redigiert von E. Gilg. Leipzig, Verlag 

 von Wilhelm Engelmann, 1925. 



This note is written to publish the fact that the second part 

 of the moss volume of the "Natural Families of Plants" has 

 appeared, and should be added to the library of moss lovers. 

 The twenty-first volume describes the characteristics of 33 

 families and their genera of flowering plants comprised in the 

 orders Parietales and Opuntiales. The typography and the il- 

 lustrations of these volumes leave little to be desired. 



John W. Harshberger. 



PROCEEDINGS OF THE CLUB 

 Meeting of April 29, 1925. 



The meeting of this date was held at the Museum Building of 

 the New York Botanical Garden. Mr. Charles Greenberg, 

 907 Fox Street, Bronx, N. Y. C, was elected to membership, and 

 the resignation of Mr. Charles Dreyer, 147 East 55th Street, 

 Brookl>Ti, was accepted with regret. 



For the scientific part of the program. Dr. N. L. Britton ex- 

 hibited a fossilized walnut which had been presented to him by a 

 contractor making excavations in western Porto Rico. The 

 nuts were found at a depth of about 60 feet in a lignitic layer of 

 Araciba limestone, perhaps of tertiary origin. The nuts re- 

 sembled somewhat the existing Juglans, but are smaller with the 

 ridges less pronounced. They certainly indicate the existence 

 of Juglans in the West Indies in very ancient times. This 

 brings up the interesting question as to the place of origin of 

 the genus Juglans, whether the new or old world. 



The next paper was by Dr. A. B. Stout, entitled, "Recent 

 studies of flower behavior of avocados." This tropical fruit, 

 sometimes called alligator pear, is destined some day to become 

 a great fruit crop. It is very nutritious, being rich in proteid 

 and oil. The conditions for its cultivation in Florida and Cali- 

 fornia are favorable. 



