28 NEW YORK STATE MUSEUM 



anthers rose-red and styles 2-3. The ripe fruit is scarlet, a little 

 longer than broad and crowned with a calyx rim. The calyx lobes 

 are hairy inside, reflexed and fringed on the margin with long stipi- 

 tate glands. 



Crataegus deweyana Sarg. 



Hagaman swamp near Rochester. It has also been found at 

 Rush by M. S. Baxter. In the Dewey thorn the leaves are ovate or 

 broadly ovate and sharp pointed or acuminate. The stamens are 

 7-10, the anthers dark rose-red and the styles 2-3. The ripe fruit is 

 scarlet, globose or subglobose and destitute of a calyx rim. The 

 calyx lobes are not strongly or conspicuously glandular serrate. 



Crataegus ferentaria Sarg. 

 Near the roundhouse of the Pennsylvania Railroad, Rochester. 

 The light armed thorn has oval or rhomboidal leaves acute at the 

 apex and rounded or broadly cuneate at the base. The petioles are 

 generally less than half an inch long and they often become red 

 toward the end of the season. The stamens are 10, anthers pale 

 yellow, styles two and calyx lobes distinctly glandular serrate. 

 The ripe fruit is crimson, globose or subglobose and destitute of a 

 prominent calyx rim. The ventral cavities of the nutlets are deep 

 and sometimes crowd upon or cut through the lateral walls. 



Crataegus laneyi Sarg. 



Genesee Valley park, Rochester. The Laney thorn may be dis- 

 tinguished from the three preceding species by its having 10-15 

 stamens, pale yellow anthers, 2-4 styles and a villose inflorescence. 

 It ' and the other three species mentioned belong to the section 

 Tomentosae. 



Crataegus tatnalliana Sarg. 



North and west of North Albany. In this plant the fruit is globose 

 or oval, and the leaves are often more or less twisted or contorted 

 on the margin, as if there was an excessive development of tissue in 

 that part of the blade. In the leaves of C. pringlei the reverse 

 condition appears to prevail. The margin of the leaf is decurved, 

 apparently because of a deficient development of the marginal 

 tissue or an excessive development of the central portion of the 

 leaf. This makes the leaf convex above, concave beneath. 



Crataegus hudsonica Sarg. 

 Tivoli hollow between Albany and West Albany. This species 

 is closely related to C. suborbiculata Sarg. and like that 

 species it has suborbicular leaves. It differs from it in having the 



