28 NEW YORK STATE MUSEUM 



A tree 3-4 m high, with a trunk sometimes 3 dm in diameter, 

 widespreading branches forming a broad flat topped open head, 

 and slender slightly zigzag branchlets light orange-green and marked 

 by many pale lenticels when they first appear, pale orange colored 

 in their first season and dull gray-brown the following year, and 

 armed with slender nearly straight, light brown ultimately gray 

 spines 4-4.5 cm long and persistent and become branched on old 

 stems. 



Banks of the Genesee river above Rochester, J. Dunbar (;^ i 

 type), June i and October 23, 1903; Tuscarora, Baxter and Dewing 

 (#295, a much older tree with smaller leaves), September 14, 

 1904, and May 30, 1905. 



Crataegus robusta n. sp. 



Leaves glabrous, oblong-obovate, gradually narrowed or rounded 

 and usually short pointed at the apex, narrowed from above the 

 middle to the cuneate entire base, and finely doubly serrate above, 

 with straight grandular teeth ; nearly fully grown when the 

 flowers open about the loth of June and then thin and lustrous above, 

 and at maturity subcoriaceous, dark green and very lustrous on the 

 upper surface,* pale yellow-green on the lower surface, 5-6 cm long 

 and 3.5-4 cm wide ; leaves on vigorous shoots often 8-9 cm long and 

 5-6 cm wide, with prominent pale yellow midribs and 6 or 7 pairs of 

 prominent primary veins; petioles stout, wing-margined often to 

 below the middle, glandular early in the season toward the apex, 

 often tinged with red in the autumn, 7-12 mm in length. Flow- 

 ers 1.8 cm in diameter, on elongated slender glabrous pedicels, in 

 broad lax many-flowered corymbs ; calyx-tube narrowly obconic, 

 glabrous, the lobes slender, acuminate, glandular serrate ; stamens 

 10-20; anthers pale pink; styles usually 2 or 3, surrounded at the 

 base by a narrow ring of pale tomentum. Fruit ripening the end of 

 September, on long slender drooping pedicels, in few-fruited clusters, 

 short-oblong to obovate, crimson, lustrous, marked by occasional 

 large pale dots, about 2 cm long and 7-8 mm wide ; calyx prominent, 

 with a broad shallow cavity, and spreading and reflexed or appressed 

 narrow lobes, dark red on the upper side below the middle and 

 often deciduous from the ripe fruit; flesh thin, yellow-green, dry 

 and mealy ; nutlets 2 or 3, gradually narrowed at the ends, rounded 

 at the base, ridged on the back, with a low grooved ridge, about I 

 cm. long, and 5 mm wide. 



A tree 5-6 m high, with a trunk covered with dark scaly bark 



