176 NOTES ON FOREST TREES. 



It grows to about the same height as the Acer Pennsyl- 

 vauica and in similar situations ; the foliage is remarkable 

 in autumn for its beautiful color. 



ACER RUBRUM (lied Maple] is a rare tree in northern 

 New York ; the largest trees that were found were 18 inches 

 in diameter and 30 or 40 feet high. 



ACER DASYCARPUM ( White Maple) is more abundant. 

 One tree was measured that was 9 feet in circumference 

 and 60 or 70 feet high. 



NEGUNDO ACEROIDES grows equally large as far north 

 as Montreal. Some of the trees that were found were 30 

 inches in circumference and 30 feet high. 



PRUNUS PENNSYLVANICA (Pin Cherry} is a small tree, 

 and a specimen 15 inches in diameter and 30 feet high was 

 the largest found ; it had 67 circles of growth which proves 

 it to be a fast growing tree and short-lived. It is every- 

 where abundant. 



PRUNUS SEROTINA (Black Cherry}, in a section between 

 Altona and West Chazy, often grows to be 3 feet in 

 circumference and 60 or 70 feet high. On the end 

 of one log 3 feet in diameter I counted 370 circles of 

 growth ; from 70 to 100 circles the growth was so slight 

 that it was necessary to place pins every 3 or 4 circles to 

 mark where I had counted and from 180 to 250 they were 

 quite as close together. 



PYRUS AMERICANA and PYRUS SAMBUCIFOLIA are the next 

 trees in order. Specimens were found, four or five growing 

 on the same clump as is the case with alders, good specimens 

 of both species, but in no case did I find the leaflets dif- 

 fering in shape more doubly serrate as they should be on 

 trees bearing the larger berries than could be found on 

 some of the trees with small berries. The petioles and 

 rachises were of a deep red on all the trees that were ex- 

 amined ; and as to the leaves being bright green on both 



