REPORT OF THE STATE BOTANIST I912 79 



September on glabrous drooping red pedicels, subglobose to slightly 

 obovoid, crimson, lustrous, marked by numerous small pale dots, 

 1.5 cm in diameter; calyx prominent with a broad shallow cavity 

 pointed and tomentose in the bottom, and spreading and incurved 

 lobes ; flesh thin, yellow, dry and mealy ; nutlets three or four, 

 rounded and broadest at the apex, gradually narrowed and rounded 

 at the base, prominently ridged on the back with a broad high ridge, 

 8 to 9 mm long and about 5 mm wide, the narrow chestnut-brown 

 hypostyle extending to below the middle of the nutlet. 



A tree or arborescent shrub 6 to J m high, with a stem covered 

 with yellowish brown bark, upright branches, and slender nearly 

 straight branchlets dark orange-green marked by pale lenticels and 

 slightly villose when they first appear, glabrous, lustrous and light 

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

 following year, and armed with stout straight chestnut-brown shin- 

 ing spines 3 to 5 cm long. 



Helmlock lake region, Livingston county, Henry T. Brown (no. 

 31, type), May 28, 1906; September 20, 1907. 



This species is named for its discoverer, Henry T. Brown, the 

 engineer of the park department of the city of Rochester who has 

 paid particular attention to the Thorns which grow in great abund- 

 ance and variety near Hemlock lake. 



PRUINOSAE 



Crataegus pruinosa K. Koch 



Verhandl. Preuss. Gart. Verein. neue Reihe 1. 346 (1854). Sargent, Suva 

 N. Am. XIII. 61, t.648; N. Y. State Mus. Bui. 122. 37 (1908). 



Crown Point, Lansingburg, Chapin, Buffalo, Belfast, Salamanca ; 

 also western Vermont, Massachusetts, eastern Pennsylvania, and 

 southern Ontario to Ohio and Illinois. 



Crataegus oblita Sargent 



N. Y. State Mus. Bui. 122. 40 (1908). 

 Buffalo. 



Crataegus arcana Beadle 



Biltmore Bot. Studies 1. 122 (1902). Sargent, Bot. Gazette XXXV. 101 ; 

 N. Y. State Mus. Bui. 122. 35 (1908). 



Syracuse, Niagara Falls, Coopers Plains ; also eastern Pennsyl- 

 vania to western North Carolina. 



