EUCALYPTUS TREES. 249 
soil onward in some new direction for their pastoral 
or agrarian pursuits. 
The plants which appear to be of primary impor- 
tance for our rural wants have been designated in 
this list with an asterisk. Of these, indeed, many 
are long since secured by the efforts of numerous col- - 
onists and their friends abroad, who strove to enrich 
our cultural resources; and in these efforts the writer, 
so far as his public or private means did permit, has 
ever endeavored to share. But although such plants 
are introduced, they are not in all instances as yet 
widely diffused, nor‘in many localities tested. Also, 
for the sake of completeness, ordinary culture plants 
appear in this index, as the opportunity seemed an 
apt one to offer a few passing remarks on their value. 
The claims of this contribution to originality must 
necessarily be very limited. What for ages has en- 
gaged the reflection of thousands cannot present abso- 
-lutely or largely a new field of research. So it is 
especially with the means and objects of ordinary 
culture of fields. To gather, therefore, froma widely 
scattered literature that which might be here in- 
structive or suggestive was mainly my task, though 
‘those gatherings may prove insignificant. Likely 
also such enumerations, in a very condensed form, 
will promote our communications for rural inter- 
changes, both cis and trans-equatorial, though mainly 
with the countries of the Northern Hemisphere, 
which predominantly, if not almost exclusively, pro- 
vided all the vegetable substances which enter into 
the main requisites of our daily life. Lists like the 
present may aid also in naming the plants and their 
products with scientific correctness in establishments 
