80 NEW YORK STATE MUSEUM 



Crataegus obstipa n. sp. 



Glabrous. Leaves rhombic, acute at the ends, finely serrate with 

 straight glandular teeth and slightly divided above the middle into 

 two or three pairs of short, broad lobes ; about one-half grown when 

 the flowers open early in June and then yellow-green and paler 

 below than above, and at maturity thin, yellow-green, smooth and 

 lustrous on the upper surface, pale on the lower surface, 4 to 4.5 cm 

 long and 2.5 to 3 cm wide, with thin midribs and primary veins ; 

 petioles slender, narrowly wing-margined to the middle, 4.5 to 6 cm 

 in length; stipules linear, glandular, bright red, deciduous before 

 the flowers open; leaves on vigorous shoots thicker, more coarsely 

 serrate and more deeply lobed, and sometimes 5 cm long and 4 cm 

 wide. Flowers on slender pedicels, in five- or six-flowered corymbs, 

 the lower peduncles from the axils of upper leaves ; calyx-tube 

 broadly obconic, the lobes separated by wide sinuses, gradually nar- 

 rowed from the base, slender, acuminate, entire or minutely glandu- 

 lar-dentate near the middle ; stamens twenty ; anthers maroon ; styles 

 three to five. Fruit ripening early in October on slender drooping 

 pedicels, obconic, rounded at the apex and at the narrow base, crim- 

 son, marked by large pale dots, pruinose, 1.3-1.5 cm long and 1 to 

 1.2 cm in diameter; calyx prominent, with a short tube, a deep nar- 

 row cavity pointed in the bottom, and spreading erect lobes ; flesh 

 thin, hard and dry; nutlets three to five, thin and rounded at the 

 ends, broader at the apex than at the base, ridged on the back, 

 with a broad, grooved ridge, 6 to 7.5 mm long and 5 mm wide, the 

 narrow hypostyle extending to just below the middle of the nutlet. 

 - A shrub 3 or 4 m high, with ascending stems and branches cov- 

 ered with dark gray bark, and thin zigzag contorted branchlets dark 

 green and marked by pale lenticels when they first appear, orange- 

 brown at the end of their first season and dull gray-brown the fol- 

 lowing year, and armed with very numerous straight chestnut-brown 

 shining spines 1.5 to 3 cm long, persistent and compound on old 

 stems and branches. 



Open pastures in heavy soil, near Chapin, Ontario county, 

 B. H. Slavin (no. 21, type), October 3, 1908; May 29, 1909. 



Crataegus beata Sargent 



Proc. Rochester Acad. Sci. IV. 97 (1903); N. Y. State Mus. Bull. 122. 

 85 (1908). 



Ithaca, Chapin, near Rochester, Hemlock lake, Canadice lake, 

 Belfast, Portage, Castile, Coopers Plains; common. 



