PROCEEDINGS OF THE ROCHESTER ACADEMY OF SCIENCE 

 Vol. 4, pp. 93-136. June i, i903. 



GARDEN 



CRATAEGUS IN ROCHESTER, NEW YORK. 

 By C. S. Sargent. 



During a visit which I made in Rochester in the autumn of 1899, 

 Mr. C. C. Laney, the superintendent of the parks of that city, called 

 my attention to a number of forms of Crataegus which seemed unlike 

 any of the described species and this hurried examination led Mr. 

 Laney, his assistant, Mr. John Dunbar, and Mr. M. S. Baxter, to make 

 a careful and systematic study of the group in the neighborhood of the 

 city and in parts of the adjacent country. The results of these studies 

 are found in this preliminary paper which serves to show the remark- 

 able richness of the valley of the lower Genesee River in species of 

 Crataegus. This segregation of forms seems to confirm the fact 

 which I have long suspected, that the country surrounding Lake 

 Ontario and the eastern end of Lake Erie and the valley of the St. 

 Lawrence River, as far east at least as Montreal Island, is richer in 

 forms of Crataegus and in the multiplication of individuals than any 

 other part of the world, with the exception perhaps of the Red River 

 valley in Arkansas. Thanks to the industry of Mr. Laney and his 

 assistants, Crataegus has now been systematically and carefully 

 studied at Rochester through three years. Many of the species are 

 now well known at all seasons of the year ; others, however, are still 

 imperfectly known, and the range of all the species beyond the imme- 

 diate neighborhood of the city is still to be determined. This paper, 

 therefore, must be considered as preliminary to a fuller description of 

 the genus in the Lake Ontario country dependent on further field 

 work. 



In the limitation of species particular attention has been given to 

 the number of stamens, the color of the anthers, and the character 

 and time of ripening of the fruit. The sections in which the species 

 are grouped are those which are adopted in the thirteenth volume of 

 my Silva of North America. 



10, Proc. Roch. Acad. Sci., Vol. 4, June 6, 1903. 



