44 NEW YORK STATE MUSEUM 



The attack by the parasite must be made early in the development 

 of the host, for it is already discolored and deformed when it has 

 but partly emerged from the ground. The spores of the parasite 

 probably pass the winter in the ground and germinate when, by 

 the early development of the host or by other causes, they are 

 brought in contact with it. Usually the parasite fruits on the 

 hymenium and stem of the host and these parts therefore are dotted 

 by the mouths of the perithecia of the parasite and more highly 

 colored than the upper surface. Still, the change of color of the 

 upper surface shows that the influence of the parasite extends to it. 



SPECIES OF CRATAEGUS FOUND WITHIN TWENTY 

 MILES OF ALBANY 



BY C. S. SARGENT AND C. H. PECK 



Early in 1902 Prof. C. S. Sargent informed the writer that he had 

 noticed some fine patches of thorn bushes a short distance west of 

 Albany and suggested that it might be well to examine them. 

 The suggestion was promptly adopted and this paper is one of the 

 results of that suggestion. At that time three species and their 

 supposed varieties constituted the known Crataegus flora of the 

 territory now under consideration. At the present time 54 native 

 and one introduced species are known to be included in it. This 

 territory is bounded by a circumference which has Albany for its 

 center and a line 20 miles long for its radius. Only certain portions 

 of the northern half of this circle have been carefully explored. 

 These parts or localities may be named and described as follows. 



North Albany lies just north of the city and is bounded on the 

 north by Ford road, east by Troy road, south by North First street 

 and west by the road running north from Loudonville road to the 

 junction of Ford road with Northern boulevard. 



West Albany includes Tivoli hollow and its adjoining hillsides. 

 It lies on both sides of the New York Central & Hudson River Rail- 

 road tracks between the city of Albany and the railroad shops at 

 West Albany. 



Menands includes the territory between the outlet of Little's pond 

 on the north and Ford road on the south, and between the Erie 

 canal on the east and the northern extension of the Boulevard 

 from Ford road to Little's pond on the west. It includes the 

 canal lot, Troy road and tollgatc localities. Golf ground and Boule- 

 vard pasture. 



North Greenbush lies east of the Hudson river and extends north 

 from Forbes avenue i mile and east from the river about ^ mile. 

 It includes Forbes manor grounds. 



