112 ROCHESTER ACADEMY OF SCIENCE. 



obovate, acute, glandular, large and conspicuous, mostly persistent 

 until the flowers open ; calyx-tube narrowly obconic, covered with a 

 thick coat of matted white hairs, the lobes abruptly narrowed from the 

 base, slender, acuminate, entire, glabrous on the outer, deeply villose 

 on the inner face, reflexed after anthesis ; stamens 20 ; anthers rose 

 color ; styles 4 or 5, surrounded at the base by a narrow ring of pale 

 tomentum. Fruit on slender elongated slightly hairy pedicels, in few- 

 fruited drooping clusters, short-oblong, scarlet, lustrous, marked by 

 large pale dots, 1.5- 1.6 cm. long, about 1.2 cm. wide ; calyx sessile, 

 with a broad shallow cavity and small linear spreading and appressed 

 lobes villose on the upper surface ; flesh thin, yellow, dry and mealy ; 

 nutlets 4 or 5, thin, acute at the ends, irregularly ridged on the back, 

 with a usually high narrow ridge, about 7 mm. long. 



A shrub or rarely a small tree 4-6 m. in height, with a stem 

 occasionally 2 dm. in diameter at the ground, remote ascending 

 branches, and slender only slightly zigzag branchlets densely villose 

 when they first appear, soon becoming glabrous, dull red-brown and 

 marked by numerous elliptical or oval pale lenticels at the end of their 

 first season, dark brown tinged with red the following year, and armed 

 with many very slender nearly straight dark purple shining spines 

 2-7 cm. in length. Flowers at the end of May. Fruit ripens at the 

 end of September. 



Rochester; Vincent Street bridge, east side of the river north of 

 the city, J. Dunbar, May 28 and September 28, 190 1, C. S. Sargent, 

 September 29, 1902 ; Rush and Rochester Junction, common in rich 

 soil, M. S. Baxter and John Dunbar, August, 1902. 



This species is named for Joseph B. Fuller, long a careful and 

 zealous student of the flora of the Genesee Valley, and curater in botany 

 of the Rochester Academy of Science. 



Crataegus Ellwangeriana, Sargent, Bot. Gazette, xxxiii. 11 84 

 (1902); Silva N. Am. xiii. 109, t. 671. 



A common species in Monroe and Ontario Counties. 



Crataegus Pringlei, Sargent, Rlwdora, iii. 21 (1901) ; Silva N. Atn. 

 xiii. Ill, t. 672. 



A few specimens are known north and south of the city. 



Crataegus spissiflora, n. sp. 



Leaves oblong-ovate, acute or acuminate, rounded, broadly 

 cuneate or rarely cordate at the entire base, sharply doubly serrate 

 above, with slender straight gland-tipped teeth, and deeply divided 



