5d 
The hundred species are distributed among thirty-one families. 
Twenty-six (26), or more than a quarter, belong to the large 
weedy order Composite. Other well-represented orders are the 
mustards and the grasses, each having eight species. 
It is a well-known fact that weeds are often introduced into 
new localities in field, and even garden seeds ; sometimes as many 
as forty kinds of weed seeds have been identified in a sample of 
clover seed, and grass seed is frequently no less free from foul 
stuff. Therefore sets of these seeds, as shown in the engraving, 
have been prepared to aid s¢ationists (pardon the coining of a new 
word for station-agriculturists, station-horticulturists, station- 
botanists and other station workers taken collectively) and seedsmen 
in determining the exact nature of much of the impurity found in 
commercial seeds. 
COLLEGE EXPERIMENT STATION, NEW BRuNSWICK, N. J., Dec. 29, 1892. 
Preliminary Report on the Flora of Luzerne County, Penn. 
By A. A. HELLER. 
We are more or less prone to consider the long-settled portions 
of our country old and undesirable ground, when botanical explor- 
ation is thought of. Mexico, the far West, or some other distant 
point, claims our attention, and we forget that all around us is an 
abundance of territory that has never been touched by a botanical 
collector. 
I have just begun to realize that the State of Pennsylvania is a 
great botanical wilderness. Many of the counties have never been 
explored, or only partially. Most of the work that has been done 
is due to the untiring energy of Prof. Thos. C. Porter. Our own 
county of Lancaster, which can boast of almost fifteen hundred 
Species, an account of which has been published by Dr. Porter, © 
has a great tract of limestone and new ted sandstone, comprising 
more than half of the county, that is sadly in need of attention. 
To me, one of the most interesting of these ‘ wild’’ counties 
is Luzerne, situated somewhat northeast of the centre of the State. 
To the Torrey Club it is especially interesting, as it falls within the 
limits of the Preliminary Catalogue, the one hundred mile — ie - 
cutting through the eastern eae of ame peers es 
