﻿1903] CRATAEGUS IN NORTHEASTERN ILLINOIS 393 



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lobes; petioles slender, wing-margined at the apex, grooved, 

 glandular, with numerous dark glands, mostly deciduous before 

 autumn, 2.5-3'^"' in length; stipules oblong-obovatc rounded 

 at the apex, glandular, tinged with red, large and conspicu- 

 ous, usually persistent after the flowers open. Flowers 1,8- 

 2.4^"^ in diameter on slender glabrous or sparingly villosc 

 pedicels in 8-12-flowered thin-branched compound corymbs ; 

 bracts and bractlets lanceolate to oblong-obovate, acute, glandu- 

 lar ; calyx tube broadl}' obconic, pale green, pubescent to glabratc, 

 the lobes gradually narrowed from the base, wide, elongated, 

 tipped with minute dark glands, finely glandular-serrate, glabrous 

 on the lower, puberulous on the upper surface; stamens 10-20, 

 usually 20; anthers pinkish purple; styles 3-5, usually 5, sur- 

 rounded at the base by tuft of white hairs. Fruit on short 

 glabrous pedicels, in compact few^-fruited drooping clusters, 

 oblong to subglobose, bright scarlet marked by numerous small 

 pale lenticels, becoming crimson and soft and succulent when 

 fully ripe, 1.2-1.6^"^ long, 1.1-1.4^"' wide ; calyx sessile, with a 

 narrow shallow cavity and enlarged serrate spreading or erect 

 lobes mostly deciduous from the ripe fruit; flesh thin, sweet, 

 yellow; nutlets 3-5, usually 4 or 5, thin, acute at the ends, promi- 

 nently ridged, with a thin narrow ridge or sometimes rounded 

 and slightly grooved on the back. 



A shrub 2-3"^ in height with numerous small stems forming narrow- 

 topped bushes, or when growing in the woods under the shade of other trees 

 sometimes arborescent in habit with a well developed trunk and 4-5*" tall; 

 branchlets stout, slightly zigzag, dark orange-green marked by many small 

 lenticels when they first appear, bright red-brown and lustrous at the end 

 of their first season, dark gray or gray-brown the following year, and armed 

 with many very stout slightly curved abruptly pointed bright chestnut-colored 

 shining ultimately gray spines 2^5''"' long. Flowers early in May. Fruit 

 ripens at the end of September or early in October and remains on the 

 branches with the leaves for another month. 



Upland pastures, the borders of woods and the high banks of streams 

 usually in hard clay soil, Barrington, June and September iSgg, May 1901, 

 Chicago Heights, May and October igoi, Orland, October 1901, May 1902, 

 Mokena, May and September 1902, E. /. HilL 



Resembling superficially Crataegus cyanophylla, Crataegus tarda differs 

 from that species in its soft succulent fruit, in its more numerous stamens, 

 and in the usually broader and thicker light green leaves. 



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