17 
Point, many of the same mosses were noted, Thelia hirtella and 
Hypnum recurvans being especially handsome and in copious 
fruit, on the bases of white oaks. An unexpected and novel fea- 
ture led the group into the field of paleobotany. Mr. F. J. Wells, 
of Greenwood Lake, photographer and student of natural his- 
tory, showed us specimens of fossil plant impressions, from the 
Pequanac shales along the motor road from Greenwood Lake 
over Mount Peter to Warwick, where the rock has been blasted 
down in widening the highway and fragments are easy to find. 
They were identified for me by Dr. Arthur Hollick, of the New 
York Botanical Garden, as Lepidodendron gaspéanum, a plant 
very similar to our modern Lycopodiums, or clubmosses, but 
much larger, of the Devonian Period. This species, judging from 
the width of the impressions in the rock, one to two inches in 
width, was not as large as the great Lepidodendrons, Sigilarias 
and Calamites of the Pennsylvanian and Mississipian Periods 
(formerly joined as Carboniferous), which grew to be sixty feet 
high, but it was obviously a giant compared to our present day, 
low-growing clubmosses. 
Fitzgerald’s Falls, on the Appalachian Trail, east of the 
Greenwood Lake-Monroe Road, is an interesting place, botani- 
cally, for mosses and liverworts; and geologically, for the vari- 
ety of formations nearby. The stream, a branch of Trout Brook, 
flows down a gully in the pre-Cambrian gneisses and granites, 
Over a wide dike of black basalt, similar to those found in many 
Parts of the Hudson highlands penetrating the pre-Cambrian and 
younger than it; while a few rods to the west is a ledge of vertic- 
ally tilted, shaly limestone, one of the basal strata of the Green 
Pond formation, which makes Bellvale Mountain to the west, 
and probably of Silurian age. A close study of the plants of this 
area would be interesting to see if there are ecological differences 
'n species, due to the varying kinds of rock. 
_ Sat Rock, an uptilted ledge of red and white conglomerate, 
Just off the Appalachian Trail, on Bellvale Mountain, was inter- 
‘sting for the dense growth of the Rock Tripe, lichen, mostly 
Gyrophora Dilleni, on the cliffs and talus. 
3 A winter excursion, jointly with the New York section of the 
Say Mountain Club, on Sunday, December 28, in the Blue 
Cuntain Reservation of the Westchester County Park system, 
Southeast of Peekskill, was interesting chiefly for the variety of 
