REPORT OF THE STATE ROTANIST 19O4 27 



Crataegus beckwithae Sarg. 

 Genesee Valley park, west side of the river, Rochester. The 

 Beckwith thorn differs from all the preceding species of this section 

 in its globose fruit, It is sometimes full and rounded at the base 

 and sometimes pointed. It is dark crimson when ripe and its flesh 

 is tinged with red. The calyx lobes at flowering time are marked 

 on the inside toward the tips with minute white dots. This peculiar 

 character is present in all our flowering specimens. The leaves are 

 broadly ovate or almost triangular. On vigorous young shoots 

 some of them are slightly cordate. 



Crataegus dunbari Sarg. 

 East bank of the Genesee river in the northern part of Rochester. 

 It has also been found at Adams Basin by M. S. Baxter and in Dela- 

 ware park, Buffalo by J. Dunbar. The Dunbar thorn differs de- 

 cidedly from all the preceding species of this section in its leaves 

 which are oval or suborbicular and become much thicker and firmer 

 with age. The fruit is globose or subglobose and crimson when ripe. 

 The stamens are lo, anthers red, styles 3-4. 



Crataegus benigna Sarg. 

 Genesee Valley park, Rochester. The benignant thorn is unlike 

 any of the previously recorded species of this section in having 15-20 

 stamens. The anthers are red and the fruit, which is longer than 

 broad, is scarlet. The leaves are often truncate or slightly cordate 

 at the base, specially on leading vigorous shoots. 



Crataegus cupulifera Sarg. 

 Seneca park, west side, Rochester. It has also been found at 

 Rush and Honeoye lake by M. S. Baxter, and at Buffalo by J. Dun- 

 bar. The cup-bearing thorn has the flowers cup-shaped. The 

 stamens are 10, the anthers pink, the styles 3-4 and the calyx lobes 

 hairy inside. The fruit is globose or nearly so and is scarlet when 



ripe. .,..^i 



Crataegus macauleyae Sarg. -^ 



Genesee Valley park, Rochester. The Macauley thorn may 

 readily be distinguished from the preceding one by its 20 stamens 

 with pale yellow anthers. It has 4-5 styles and its ripe fruit is crim- 

 son and has a more prominent calyx rim. The fruit in both is nearly 

 alike in size and shape. Both species belong to the section Coccineae. 



Crataegus gemmosa Sarg. 

 Genesee Valley park, Rochester. In this species the leaves are 

 oval or occasionally rhomboidal or obovate. The stamens are 20, 



