138 
SILVA OF NORTH AMERICA. 
central Michigan,’ central Iowa,’-along the Des Peres River at Webster, St. Louis County, Missouri,’ at 
Springfield, Missouri, and in middle Tennessee.* 
The specific name is formed from the Christian name of Mrs. J. O. Wilcox of Ashe County, North 
Carolina.® 
1 Crategus Margaretta was collected near Lansing, Michigan, in 
May, 1901, by Professor W. J. Beal. 
2 Quarry, Iowa, F. W. Forest, May 19, 1900 (No. 1996); Steam- 
boat Rock, Iowa, L. H. Pammel, June 14, 1900 (No. 1989). 
8 In the Gray Herbarium there is a specimen of Crategus Mar- 
garetta collected in Missouri by E. Hall in 1870, the place of 
collection being not otherwise given ; and in the Gray Herbarium 
there is also an Iowa specimen collected by M. Jones in 1877. 
Crategus Margaretta was first collected on the Des Peres River 
by H. Eggert in the spring of 1886 ; and in Springfield, Missouri, 
where this tree grows to a large size and is abundant, it was first 
noticed by Professor Trelease and myself in September, 1900. 
4 Crategus Margaretta was collected on limestone hills in West 
Nashville, Tennessee, where it is a low shrub, on May 2, 1900, by 
Mr. T. G. Harbison. 
5 W. W. Ashe, in litt. 
EXPLANATION OF THE PLATE. 
PuateE DCLXXXV. Cratmcus MARGARETTA. 
1. Portion of a flowering branch, natural size. 
AP oF wp 
. Vertical section of a flower, enlarged. 
. A calyx-lobe, enlarged. 
A fruiting branch, natural size. 
. Cross section of a fruit, natural size. 
. A nutlet, front view, enlarged. 
. A nutlet, rear view, enlarged. 
