﻿3S2 BOTANICAL GAZETTE [june 



A tree 6-T^^ in height with a trunk occasionally 2-2.5'" long and 1.5- 

 1.8'^'" in diameter, covered with close dark gray bark 6-7™"^ thick, separating 

 into long narrow thin plate-like scales, stout spreading branches forming a 

 handsome open head, and slender nearly straight branchlets thickly coated 

 when they first appear with matted pale hairs, light red-brown and lustrous 

 at the end of their first season and dark gray-brown the following year, and 

 unarmed or armed with stout nearly straight or curved spines from 2.5-6'^'" 

 long. Flowers from the 5th to the 15th of May. Fruit ripens about the 

 middle of September and soon falls. 



Open woods and pastures in rich moist soil, Barrington, May and Sep- 

 tember 1899, Mokena, September 1899, May 1900, May and September 

 1901, Glendon Park, May and September 1901, Lake Zurich, May and Sep- 

 tember 1 90 1, E. /. HilL 



Stamens usually 20, rarely 10, 



Crataegus assurgens, n. sp. — Leaves broadly ovate, acuminate, 

 rounded or rarely cuneate at the wide entire base, sharply doubly 

 serrate above, with straight gland-tipped teeth and slightly 

 divided into three or four pairs of small acuminate lobes ; about 

 one-third grown when the flowers open and then roughened 

 above by short white hairs and glabrous or sparingly villose 

 below along the midribs and veins with persistent hairs; at 

 maturity membranaceous, dull dark green and scabrate on the 

 upper surface, light yellow-green on the lower surface, 7-9^"" 

 long, 6-7'^'^ wide, with slender yellow midribs and thin veins 

 arching obliquely to the points of the lobes ; petioles slender, 

 slightly grooved, villose early in the season, becoming pubes- 



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cent, 2.5-4 ^"^ in length; stipules linear to linear-obovate, acumi- 

 nate, glandular, caducous ; on vigorous shoots leaves often 

 deeply lobed, very coarsely serrate, sometimes 10^'° long and 

 wide, with long stout glandular petioles and foliaceous lunate 

 acuminate coarsely glandular-serrate persistent stipules. Flowers 

 1.8-2.2'^"' in diameter on short villose pedicels, in rather compact 

 8-15-flowered thin-branched hairy compound corymbs; bracts 

 and bractlets oblong, acuminate, often somewhat falcate, glandu- 

 lar, turning brown in fading, mostly deciduous with the opening 

 of the flowers ; calyx tube narrowly obconic, sparingly villose, 

 the lobes long, narrow acuminate, tipped with minute red glands, 

 finely glandular-serrate, glabrous on the outer, pubescent on the 



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