90 AMERICAN FERN JOURNAL 
grew upon a shelving elevation, and, as it is several years 
since I visited the spot, it may have disappeared. For 
a knowledge of its hiding-place I am indebted to Joseph 
eehan. 
Everywhere throughout ‘the Wissahickon” appears 
Polystichum acrostichoides, while near Springfield Avenue 
grow Aspidium marginale, A. spinulosum, A. cristatum, 
and A. Goldianum. Nearby also appears a solitary 
group of Woodwardia angustifolia. Upon ‘“ Paper-mill 
Run” are, or were, Osmunda regalis, O. cinnamomea, 
and O. Claytoniana. 
I have now named our best-known ferns, some of 
which are very common, others being rare—a!though all 
may be common to another locality. Among those 
rare with us is Lygodium palmatum, a single station of 
which in Wissahickon is near “Old Red Bridge.’ Adi- 
antum pedatum, once with us very common, is now rare 
and only sparingly appears throughout the district. 
Perhaps the rarest fern now appearing near Wissahickon 
is Struthiopteris germanica, confined to one station and 
appearing out of place, for one usually thinks of it in 
connection with the Woodwardias and Schizaea of New 
Jersey. The locality was made known o me by George 
Redles. In many places appear the Botrychiums, the 
most common being B. virginianum, while close behind 
is B. ternatum, with its varieties intermedium and dis- 
sectum, for I hold the last two as but varieties of the 
first, produced by check, and which, like Onoclea sen- 
sibilis, var. obtusilobata, may be produced at will. 
Variations bring us to hybridization and our most 
interesting fern, which was described from Roberts's 
Run, almost directly opposite the mouth of Wissahickon 
Creek, and is known as Asplenium ebenoides. This was 
discovered by the father of our worthy chairman, who was 
Robert Robinson Scott, and in the year 1862. For 
many years this district had been visited by a coterie 
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