A Century of American Weed Seeds. 
By Byron D, HALSTED. 
A collection of one hundred kinds of weed seeds, brought to- 
gether in the shape shown in the accompanying engraving, is a 
new thing in American Economic Botany. 
The seeds are placed in dram metal screw-cap vials, arranged 
in a shallow tray about the length and breadth of a standard 
herbarium sheet, as illustrated in the cut. Each bottle bears a 
number and the botanical and one or more common names of the 
Species of the seed contained therein, as for example: 
“No. 34. Anthemis Cotula,L. Mayweed, Dog-fennel.” 
Upon the underside of the cover to the tray is pasted a full list 
of the species with numbers to correspond with those upon the 
vials. After the common names the letter A indicates that the 
Species is annual; B, biennial; and P, perennial. Thirty-eight (38) 
are native species and sixty-two (62) are from abroad, thus show- 
ing a large majority of foreign origin. The annuals lead with 
forty-eight (48) species; perennials next with thirty-five (35); 
biennials, fifteen (15); and two (2) live either one or two years. 
