CRATAEGUS IN ROCHESTER, NEW YORK. I03 



in width ; calyx sessile, with a deep narrow cavity and elongated 

 distinctly oblanceolate lobes coarsely glandular-serrate above the 

 middle, dark red on the upper side near the base, spreading and 

 incurved, often deciduous from the ripe fruit ; flesh yellow, thick, firm 

 and bitter ; nutlets usually 4, rarely 3, thick, acute at the ends, 

 prominently ridged on the back, with a high narrow ridge, 8 mm. 

 long. 



A broad shrub with numerous stout stems covered with dark 

 gray-brown bark, many ascending branches and stout erect branchlets, 

 light orange-green when they first appear, light olive or reddish 

 brown, lustrous and marked by many small pale lenticels at the end 

 of their first season, becoming ashy gray the following year and armed 

 with many stout straight or slightly curved light chestnut-brown 

 shining spines 3-4 cm. in length ; winter-buds globose, about 5 mm. 

 in diameter, covered with dark red lustrous scales. Flowers from the 

 20th to the 25th of May. Fruit ripens the middle of October. 



Rochester ; common in the Genesee Valley, on rich heavy soil 

 in open situations, C. C. Laney, May, 1900, C. S. Sargeiit^ Sep- 

 tember, 1900 and 1902, C. C. Laney and John Dunbat', May, June 

 and September, 1901 ; Rush and Avon, New York, Af. S. Baxter, 

 August, 1902; Buffalo, September, 1901 and Chippewa, Ontario, 

 October, 1902, Jo/vi Diinbar. 



Crataegus diffusa, 71. sp. 



Glabrous, with the exception of the hairs on the upper surface of the 

 young leaves. Leaves ovate, acuminate, full and rounded or broadly 

 cuneate at the entire or glandular base, sharply and finely serrate 

 above, with straight gland-tipped teeth, and divided into four or five 

 pairs of short, broad acuminate lateral lobes ; tinged with red and 

 covered on the upper surface when they unfold with short, rigid white 

 hairs more or less persistent until the flowers open but then membran- 

 aceous, light yellow-green, and paler on the under than on the upper 

 surface; at maturity thin but firm in texture, dark bluish green lustrous 

 and slightly scabrate above, pale, blue-green below, 5.5-7.5 cm. long, 

 5-6.5 cm., wide, with slender yellow midribs often tinged with rose 

 color toward the base late in the season, and thin primary veins, 

 arching obliquely to the points of the lobes; petioles slender, wing- 

 margined toward the apex by the decurrent base of the leaf-blades, 

 grooved, glandular early in the season, with minute dark red scattered 

 glands, 3-4 cm. in length. Flowers 1.6-2 cm. in diameter on long, 



