FS ber of sheets of Lemna Valdiviana Philippi, 
aq _ interesting one, the plant will be desired by 
1894.] Briefer Articles. 507 
will be of interest as way-marks indicating its progress eastward. I 
first noticed it in August, 1890, when a patch of a dozen or more 
plants was found by Wolf Lake, on the eastern border of the city. 
' They were on a side track of the Pennsylvania R. R., about a mile 
from the main line. The boundary line between Illinois and Indiana 
crossed the track so obliquely at this point that both states were rep- 
resented in the small area they occupied. A month later others 
were found at Clarke, Ind., a station in the pine barrens, nine miles 
east of the boundary line, on the main line of the railroad. In a 
couple of years the plants had spread considerably, and in 1893 were 
very abundant on the branch of the road running to Hammond and 
East Chicago. In late autumn one would come upon them blown about 
the fields as tumble weeds, though as yet but few are found growing 
in fields. They are well represented on railroads in the southern and 
eastern portions of the city, and along those crossing the northern part 
of Lake co., Ind., within three or four miles of Lake Michigan, and 
probably much beyond. In August, 1894, I found a few at English 
Lake, Starke co., Ind., seventy miles from Chicago. ee 
The fewness of the plants in each of these localities indicates that. 
the season in which they occurred was about the first of their appear- 
ance. The specimens were generally rather small, but examples two- 
or three feet in diameter are not rare now. “ties | 
These plants were, at the time of finding them, identified as Sa/so/a 
Kali L., and were so published in “The Flora of Cook County, Il- 
linois, and a part of Lake County, Indiana.”* They were afterwards 
mentioned under the same name in notes con eh 
ICAL GazETTE.2 Subsequent study of the plants and comparison wit 
specimens from Nebraska led to their identification with the variety 
tragus.—E. J. Hu, Chicago, I. 
Lemna Valdiviana.-—I have collected and floa 
ted out a large num- 
discovered lately in 
As the station is an 
botanists, and I shall 
k for it—WALTER 
Randolph, Mass., hy Dr. George G. Kennedy. 
be very glad to send it to anybody who may ¢ 
Deane, 9 Brewster st., Cambridge, Mass. : x 
Ruled slides again.—I have found them already in new tgs ; 
_ just received from the Bausch & Lomb Optical Co., Rochester, N. *- 
_ Irefer to a slide for a stage ease i : 
slide was hot enough to soften it, a stam 
2 making clean eee 20X20™. I hope they can een pe 
_ down, so that every one will get them.—W. J. BEAL, peice ah 
lege, Mich These have been in the market for several yeats- 
\Bulletin of the Chicago Acad. of Sci. 2: 155. 189¥- 
. Ag. 1892. 
‘ke, 19: 248 
