244 STATE GEOLOGIST. 
in these departments. Especially in the rich moist woods 
do the ferns attain a luxuriant growth; some species, we 
think, being three to four feet in hight. O* the grasses we 
have examined a few, but not carefully enough to notice 
them in the report. Want of time and of the requisite 
instruments for investigating the properties of most of the 
above named classes, has deterred us from entering un their 
study. It is to be hoped that some one better able to 
prosecute this work, will at no distant day undertake the 
labor of presenting to the public a full list of the Flora of 
Jefferson county. 
I am, 
Your obedient servant, 
A. H. YOUNG. 
ABBREVIATIONS. 
The month named in the description, indicates the time 
of flowering. 
The letters immediately following the specific name of each 
plant, indicates the person who first described it. 
The abbreviation adv. for adventive, denotes that the 
plant is exotic. 
iu. Europe, Afr. Africa, Mer. Mexico, S. Am. South 
America. 
