122 The Botanical Gazette. [March 
of P. pectinatus but is made identical with those from Michi- 
gan, which Dr. Morong subsequently published as P. inter- 
ruptus. Its strong resemblance to P. flabellatus Babington, 
which Dr. Morong makes a synonym of this species, was 
quite apparent from the first. These three localities seem to 
be the only undoubted ones from which it has been obtained, 
though from specimens collected in the Au Sable river, 
Frankfort, Mich., it may also be present there. The lack ol 
mature fruit, which I have never been able to obtain, leadsto 
considerable difficulty in distinguishing it from forms ofP. 
pectinatus. The locality at South Chicago was, soon afterits 
detection there, destroyed by dredging and the building of 
docks, and with it the hope of getting ripe fruit late in the 
season near at home. I have examined them as late as the 
twenty-second of October without finding it. The species's 
no doubt extant in other localities, especially in northem 
Michigan. 
ELEOCHARIS MELANOCARPA Torr.—Found in 1894 on the 
sandy borders of Pine lake, Laporte, Ind. Soon after it w& 
Starke co., Ind. I donot find it reported elsewhere fro 
diana. The locality is but a little north of its northern ier 
in Illinois, Henderson and Peoria counties (Patterson), and 
doubtless near its northern limit in Indiana. : 
EQUISETUM ROBUSTUM Braun.—Bluffs of St. Joseph ee 
near St. Joseph, Mich. Specimens of this scouring ‘ 
were obtained in 1894 growing in the springy soil of the sitet 
banks of the river at a place locally known as Roy re. 
Heights. This is farther north than I find it given elsewnrt 
In Illinois it occurs from Peoria southward. Its more ® 
home is toward the Ohio river. 
Chicago, Ill. 
