l886.] NEW-YORK MICROSCOPICAL SOCIETY. 5 



Acer Fennsylvanicum, Linn. 

 spicatum, Lam. 

 ctrcinatum, Pursh. 

 saccharinum, Wang. 

 dasycarpum, Ehrht. 

 rubrum^ Linn. 

 plantanoides, Linn. 

 pseiido-platanus, Linn. 



On Acer rubrum and Acer dasycarpuin the growth does 

 not seem to be as vigorous as on the remaining species. 

 JVegundo aceroides, Moench. — Abundant and vigorous. 

 Robinia Pseudacacia, Linn. 

 viscosa, Vent. 



Quite abundant, but apparently not vigorous. 

 Gymnocladus Canadensis, Lam. — Very little was observed on 



this tree. 

 Gleditschia triacanthos, Linn. — Not abundant, and in small de- 

 tached masses. 

 Cercis Canadensis, Linn. — A very small quantity at the base 



only. 

 Pruniis serotina, Ehrht. — Abundant at the base only, the bark 



apparently too hard for its growth. 

 Pyrus Americana, D. C — Abundant and vigorous. 

 Cratxgiis Crus-galli, Linn. 

 cocci nea, Linn. 

 Oxyacantha, Linn. 

 tomentosa, Linn. 



Growth not abundant, and weak. 

 Amelanchier Canadensis, Torr. and Gray. — Abundant and 



vigorous. 



Hatnamelis Virginica, Linn. — Very little was found on this tree. 



Corniis Florida, Linn. — This tree does not seem adapted to its 



vigorous growth, as very little was found, and then at the 



base only. 



Nyssa sylvatica, Marshall. — Not abundant, and only near the 



base. 

 Diospyros Virginiana, Linn. — Not abundant, and at the base 

 of the tree only. 



