264 CAPRI FOLIACEAE 



under surface usually is thickly covered with stellate hairs, at 

 any rate along the veins, of which there usually are 6 or 7 pairs. 

 The petioles are }i to lyz inches long and glabrous but covered 

 with reddish glands. 



The white flowers, which appear from late in May to early 

 June, are produced in cymes ll/^ to 3 inches broad, the rays of 

 which are thickly covered with reddish glands. There are usually 

 6 or 7 sterile flowers in each cyme. The fruit, which matures 

 in late September and October, is black, broadly oblong, about 

 1/^ inch long and less than that wide. It contains a flat stone, 

 one surface of which is marked with 2 marginal grooves. 



Distribution. — The Soft-Leaved Arrowwood is a shrub that 

 grows on high banks of rivers and streams in Indiana and 

 Kentucky and west to Missouri. In Illinois, it is rare and thus 

 far has been reported with authority only near Marshall in 

 Clark County, and Metropolis in Massac County. 



VIBURNUM ACERIFOLIUM Linnaeus 



Mapleleaf Viburnum 



The Mapleleaf Viburnum, fig. 70, is a relatively low shrub 

 2 to 6 feet high with short branches and pubescent branchlets, 

 which bear opposite, 3-lobed leaves that are palmately 3-nerved 

 from the base. The leaf blades are generally ovate in shape and 



2 to 6 inches long, with about the same range in width. The 

 lobes are acute at the apex, the lateral lobes spreading. The base 

 of the leaf is rounded to subcordate, and the margins are coarsely 

 and irregularly toothed. The upper surface is pubescent to al- 

 most smooth, but the lower surface is densely pubescent with 

 both simple and stellate hairs and is covered with sessile glands. 

 The round petiole, \/^ to \ inch long, is pubescent and without 

 glands. 



The white or faintly pink-tinted flowers, which bloom from 

 about the middle of May on to the middle of June, are borne 

 in pubescent cymes ll/^ to 3 inches wide. There are commonly 



3 to 7 sterile flowers in each cyme. The fruit, which matures 

 in autumn, is commonly black, dull, without bloom, globose to 

 slightly oblong, and a little more than 14 i^^ch in diameter. Its 

 pulpy flesh incloses a lens-shaped stone, 1 face of which is di- 

 vided equally by 2 deep grooves, the other by a central and 2 

 marginal grooves. 



