S2 NEW YORK STATE MUSEUM 



Crataegus pelacris n. sp. 



Glabrous with the exception of the hairs on the young leaves. 

 Leaves ovate, acuminate, abruptly cuneate or rounded at the wide 

 base, sharply often doubly serrate with straight or incurved glandu- 

 lar teeth, and divided usually above the middle into four or five pairs 

 of small acuminate recurved lobes ; tinged with red when they un- 

 fold, and at the end of May when the flowers open, thin, yellow- 

 green, and covered above by short white hairs and glabrous below, 

 and at maturity thick, glabrous, dark blue-green on the upper sur- 

 face, pale blue-green on the lower surface, 4 to 5 cm long and 3 to 

 4.5 cm wide; petioles slender, sparingly glandular, 2 to 2.5 cm in 

 length ; leaves on vigorous shoots cuneate at the base, more coarsely 

 serrate, more deeply lobed, and often 6 to 7 cm long and broad. 

 Flowers 1.8 to 2 cm in diameter on slender pedicels, in small com- 

 pact mostly five- or six-flowered corymbs, the much elongated lower 

 peduncles from the axils of upper leaves ; calyx-tube broadly obconic, 

 the lobes separated by wide sinuses, gradually narrowed from the 

 broad base, acuminate, entire or minutely glandular-dentate near the 

 middle, reflexed after anthesis ; stamens twenty ; anthers large, bright 

 rose color; styles five, surrounded at the base by a ring of white 

 hairs. Fruit ripening in October on drooping pedicels, subglobose to 

 obovoid, rounded at the ends, green and pruinose, becoming red when 

 fully ripe, 1 to 1.2 cm in diameter; calyx prominent, with a short 

 tube, a broad deep cavity wide in the bottom, and spreading lobes ; 

 flesh thin, hard and dry; nutlets five, thin and rounded at base, 

 rounded and grooved on the back, 6 to 6.5 mm long and 4 mm wide, 

 the broad conspicuous hypostyle extending to below the middle of 

 the nutlet 



A shrub 3 to 4 m high, with ascending stems and branches covered 

 with dark gray bark near the ground, and stout, slightly zigzag 

 branchlets dark orange-green and marked by pale lenticels when 

 they first appear, dull chestnut-brown at the end of their first season 

 and red-brown the following year, and armed with numerous stout 

 straight or curved bright chestnut-brown shining spines 3 to 4.5 cm 

 long. 



Pastures near Olean, B. H. Slavin (no. 51, type), May 25 and 

 September 19, 1908; pastures near Salamanca, B. H. Slavin 

 (no. 18), June 6 and September 24, 1907. 



Crataegus amoena Sargent 

 N. Y. State Mus. Bui. 122. 38, 86 (1908). 

 Niagara Falls and Coopers Plains. 



