FERNS oF BALTIMORE 23 
ers. The first is not rare, but the second must be a 
mistake. 
Pteretis nodulosa (Michx.) Nieuwland. Two stations 
on the Gunpowder River, at one of which the first speci- 
mens reported south of Pennsylvania were found, are 
now deeply submerged, owing to the construction of a 
new dam. There is at least one station on the Patapsco, 
not far from Alberton, Balto. Co. 
Filiz bulbifera (L.) Underw. This was listed by Aikin, 
but has not been seen in recent years. On the limestone 
outcrops there are no places known to the writer which 
seem quite suited to this fern. 
EQUISETACEAE. 
Equisetum arvense L. Quite common in Baltimore 
Co., especially along railroads, but it has not been seen 
in Anne Arundel Co., which lies entirely on the Coastal 
Plain. 
Equisetum sylvaticum L. Listed by Aikin and found 
by Sollers near Ruxton, Baltimore Co. This place 
could not be found by the writer, but some years ago 
he found a colony at Bare Hills, a serpentine outcrop 
in Baltimore Co. 
LYCOPODIACEAE. 
Lycopodium clavatum L. Listed by Aikin. Found 
by the writer at Loch Raven, the part of the Gunpowder 
River dammed up for the Baltimore water supply. The 
plants were at such a level that they must have been 
submerged when the new dam was built. It fruited 
very sparingly. : 
Lycopodium carolinianum L. Listed by Sollers as 
having been found just outside of the limits of the area 
included in his list: that is a square of twenty-five miles 
on a side, with the City Hall of Baltimore at the center. 
