Spire nach heparan cca a get 
ness of cultivated soils; the second is that of the lawns about the De- 
With a few exceptions the specimens were personally collected in the 
grounds of the Department, and ave to be so understood when nothing 
else is said in their description. They all grew in the summer of 1880 
except the few series illustrative of the first year’s- growth of certain 
species. The character of the soils has been designated as rich or gar- 
den soil, good soil, poorer soil, and wayside soil. The first is that of the 
experimental garden of the Department, and is above the average rich- 
pa'tment building, the third, a hght gravelly soil, occurring in a portion 
of the grounds, and the last the gutters and paths. 
The specimens were cut close to the roots, weighed and dried rapidly 
in a current of air at 60° C. The methods of analysis were such as 
have been described in previous reports. 
