CAPRIFOLIACEAE 265 



Distribution. — The Mapleleaf Viburnum, a shrub that 

 grows along the upper part of wooded slopes, ranges from 

 New Brunswick to Wisconsin and south to Georgia and Ala- 

 bama. In Illinois, it is by no means common. It grows in the 

 northeastern corner of the state, Jo Daviess County in the 

 west, and as far south on the eastern side of the state as Clark 

 County. 



VIBURNUM TRILOBUM Marshall 

 American Cranberrybush 



The American Cranberrybush, fig. 70, is an erect shrub 3 to 

 10 feet high with smoothish, gray-barked branchlets, which bear 

 opposite, 3-lobed leaves with 3 or 5 palmately arranged main 

 veins. The leaves stand on petioles up to about ^ inch long, 

 which are smooth and bear 2 large glands near the base of the 

 leaf. The blades are broadly ovate in general shape, 2 to 4 

 inches long, and 2 to about 5 inches wide, and more or less 

 pubescent both above and below. The lobes are acute at the 

 tip ; the blade is usually slightly cordate at the base ; and 

 the margins are coarsely and irregularly toothed. 



The white flowers appear in June in cymes covered more or 

 less with red glands, and all of the outer flowers of the cymes 

 are sterile. The red, translucent fruit matures in September 

 but persists on the shrub. It is globose to oval, about 14 inch 

 in diameter, and very sour and contains a broadly ovate to 

 nearly circular stone, which is concave on one face and convex 

 on the other but not marked with grooves or ridges on either 

 face. 



DiSTRiBUTiox. — The American Cranberrybush inhabits rich, 

 low woods from Newfoundland to British Columbia and south 

 to New Jersey and South Dakota. In Illinois, it is a rare shrub 

 occurring only in Cook, Lake and Jo Daviess counties. 



SYMPHORICARPOS (Dillenius) Ludwig 



Coralberry Snowberry 



The coralberries are shrubs with opposite, short-petioled 

 leaves, and they bear white or pink flowers in small terminal 

 or axillary clusters. The sepals are united so that the calyx 

 is 4- or 5-toothed, and the 4 or 5 petals are united into an 



