60 ROCHESTER ACADEMY OF SCIENCE. 



of the Academy and of the Park Commission at Rochester, in the 

 State Herbarium at Albany, the National Herbarium at Washington, 

 or in private collections of the members. Our acknowledgments 

 are due to the State Botanist and to several members of the staff 

 of the National Herbarium for their kindness in the identification 

 of species. 



In Rochester and vicinity many trees remarkable for size, 

 beauty of form or rarity are to be found. Mr. John Dunbar, As- 

 sistant Superintendent of Parks, whose knowledge of the trees of 

 the region is widespread and thorough, kindly consented to describe 

 some of the most noteworthy specimens and give their locations. 



Mr. Fred S. Boughton, a member of the Botanical Section, has 

 devoted several years of study to the Hymenomycetese of Rochester 

 and some of the adjoining towns, and the results of his labors are 

 given in a list following that of the flowering plants. Mr. Boughton 

 is a close and indefatigable student, and his labors have been recog- 

 nized by having his name given to two new species which he dis- 

 covered, one in the Adirondacks and the other in Monroe county: 

 Lactarius Boughtonii Pk. and Hypholoma Boughtonii Pk. 



Territory Included. 



The territory included covers the same area as the lists of 1896 

 and 1910, comprising the whole of Monroe county and parts of 

 Genesee, Livingston, Ontario, Orleans and Wayne counties, being 

 in general the lower drainage basin of the Genesee river, with that 

 of Irondequoit creek and smaller streams upon the lake border. 

 Localities in Ontario county which had not been thoroughly ex- 

 plored previously, have within the last two years been visited many 

 times by our members, and, in consequence, a number of new species 

 and several new stations for rare and scarce plants have' been added 

 tc our list. 



Introduction of Species. 



The number of introduced species is increasing rapidly every 

 year. Many of these introductions are western plants and are found 

 along the railroad tracks, which have been quite regularly patrolled 

 by some of our members every season. 



