894 



JOURNAL OF rOKESTRV 



Table 2. — Weight of Seed. — Finns Muricaia Cones from Luffenholz Creek, 

 Humboldt County, California. 



' Gram clean seed per cone. 



Column 4 of Table 2 seems to show that seed of this species which 

 are retained in cones on the tree, tend to increase in weight for sev- 

 eral years; at least down to the seven-year point. In view of this 

 tendency it is rather difficult to explain the extreme lightness of the 

 12 and 13 year old seed. It may be that most of the cones bearing 

 large seed will lose them during short dry periods more easily than 

 those with lighter seed. It was very difficult to find any considerable 

 number of cones older than 7 years so that the figures for later age 

 classes are not supported by an adequate number of seed. 



From the above figures, it will be noted that it requires 2,383 cones 

 weighing approximately 153 pounds when green to produce one pound 

 of clean seed. 



GERMINATION EXPERIMENTS 



After extraction of this bishop pine seed it was planted in seed 

 beds in the forest nursery at. Berkeley to test the comparative vitality 

 of the seed of different ages. The seed from each lot of cones was 

 planted in a series of rows using two hundred seed per row as the 

 unit. The seed from Monterey was planted March 8th ; that from 

 Humboldt on April 19th. Counts of germination, loss, etc., were made 

 at frequent intervals during the period of rapid germination and as 



