466 TREES OF NORTH AMERICA 



A tree, 30-40 high, with a tall straight trunk 12'-18' in diameter, thick branches form- 

 ing a broad round-topped symmetrical head, and branchlets hoary-tomentose at first, be- 



Fig. 421 



coming light red-brown and puberulous and ultimately pale orange-brown, and armed 

 with occasional straight or slightly curved chestnut-brown lustrous spines 1 j'-l' in length. 

 Distribution. Walpole Island, Lamberton County, southwestern Ontario; Belle Isle in 

 the Detroit River, near Port Huron, St. Clair County, and in the neighborhood of Grand 

 Rapids, Kent County, Michigan; northeastern Illinois (Cook, Will, Lake and Dupage 

 Counties), and in the neighborhood of Milwaukee, Milwaukee County, Wisconsin. 



70. Crataegus arkansana Sarg. 



Leaves oblong-ovate or oval, acute, rounded, broadly cuneate or truncate at base, 

 usually divided above the middle into 3 or 4 pairs of short broad acute lobes, and serrate 

 sometimes to the base with short straight glandular teeth, when the flowers open about the 



Fig. 422 



middle of May nearly one third grown and coated with soft white hairs, and at maturity 

 thick and leathery, dull dark green and glabrous on the upper surface, pale yellow-green on 

 the lower surface, 2'-3' long, and If '-2' wide, with a stout light yellow midrib and primary 



