SEED DATA ON SOME SECONDARY TREE SPECIES 

 By E. a. Ziegler 



Several seed experiments carried on in the Pennsylvania State 

 Forest Academy nursery in 1910 and 1911 are worthy of cata- 

 loguing, partly because they deal with the less common forest 

 trees on which there is little recorded data; partly because they 

 add information on several species in respect to their hardiness 

 under southern Pennsylvania climatic conditions. 



The nursery is located about 10 miles north of the Maryland 

 line in Franklin County, at the west foot of the Blue Ridge 

 (here known as the South Mountains) at an altitude of 1,000 

 feet. 



The experiments were conducted by Mr. Arthur B. Wells 

 under an Instructor's observation. These notes are summarized 

 from Mr. Wells' report filed at the Academy. 



Platanus occidentalis. The most elaborate and detailed experi- 

 ment was made with the seed of the American sycamore. 



Seed balls were gathered locally from three trees in different 

 situations. The balls had hung on the trees all winter. Five 

 balls from the first tree A showed the following detailed results : 



Total... 34.75 8976 23.30 67 2.45 7 9.00 26 



The following summary may be made of the number of seeds 

 per pound of cleaned seeds and per pound of dry balls for the 

 three trees : 



Balls Cleaned Seed 



Tree Number Weight, Grams Number Weight, Grams 



A 5 34.75 8976 23.30 



B .. 1998 5.00 



B* 1 2.58 1028 1.60 



C 1 6.05 1850 4.23 



C 9 53.78 .... 38.50 



Double ball. 



361 



