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196 ROCHESTER ACADEMY OF SCIENCE. [June 22, 
appears to be the form described by Eaton, in the Ferns of North 
America, as var. augustata. 
Onoclea, Linneus. 
36. O. sensibilis, Linneus. This is the so-called Sensitive 
Fern, a name of no significance in its application. A common species 
in moist fields and thickets, widely distributed. This fern is. peculiar 
and interesting as relates to both its sterile and its fertile fronds, which 
are so widely different. 
37. O. Struthiopteris, Hoffman. The Ostrich Fern, though’ 
not so common as the preceding, is, yet, not rare. It is found in rich, 
moist soils, in shaded places. The plant presents a grand appearance 
with its tall fronds arrayed in vase-like form. The tallest specimens 
which I have seen have been about four feet. Both Gray and Eaton 
mention the plant as sometimes growing to a height of ten feet. 
Woodsia, R. Brown. 
38. W. obtusa, Torrey. Absent. 
39. W. Llvensis, R. Brown. Absent. 
40. W. hyperborea, R. Brown. Absent. 
41. JW. glabella, R. Brown. Absent. 
Dicksonia, L’Heritier. 
42. D. pilosiuscula, Wildenow. The MHay-Scented Fern 
is not plentiful in the immediate vicinity of Rochester. The 
writer has never had the good fortune to find it. W. H. Lennon 
reports it from the ravine at Holley. Fuller, on the authority of Booth, 
reports it “ Vicinity of Rochester.” Fish mentions it from the town 
of Ontario, in Wayne County, and as he was a careful and industrious 
collector, the fact of absence of any mention of it close to the city or 
in Monroe County, with no mention of it by Fuller or Dr. Searing, 
leads to the conclusion that it is scarce, and perhaps absent from this 
county. I have seen specimens of it from Allegany County. It is a 
fern of rather delicate texture, finely cut and very beautiful. Eaton, 
in Ferns of North America, mentions its habitat as “ moist woods, and 
often in low, grassy places.” Gray says, ‘moist and shady places: 
Lawson, in the Fern Flora of Canada, says, “stony pastures and way- 
sides” The same author mentions it as common in Nova Scotia, 
Quebec, and New Brunswick, but in Ontario, “not common, and 
