1864.] LAWSON ON CANADIAN FERNS. 279 



specimens agree, in every respect, with the typical European form 

 of the species, which is exceedingly variable. Only one station 

 was previously known for this fern in all North America, viz., 

 limestone rocks along Chittenango Creek, near the Falls, respcting 

 which Professor Torrey observed : — " This fern is undoubtedly 

 indigenous in the locality here oiven, which is the only place where 

 it has hitherto been found in North Americi." It was first 

 detected by Pursh, who found it in shady woods, among loose 

 rocks in the western p irts of New York, near Onondago, on the 

 plantations of J. Geddis, Esq. This species (he said) I have 

 seen in no other place but that here mentioned, neither have I 

 had any information of its having been found in any other part 

 of North America. (^ParsJi.) Nuttall states that he found it in 

 the western part of the state, without giving the locality ; but 

 according to Dr. Pickering, the specimens of Mr. Nuttall, in the 

 herbarium of the Academy of Sciences in Philadelphia, are 

 marked, " near Canandaigua, at Geddis's farm, in a shady wood, 

 with Taxus Canadensis^^^ Torrey Fl. N. Y., ii, p. 490. This fern 

 occurs throughout Europe, and also in Northern Asia. Mr. 

 Moore considers the Mexican S. Lindeni as a mere veriety of this 

 species. In Europe there are many remarkable varieties, of which 

 Mr. Moore has figured and described more than fifty that occur 

 in Britain. The great beauty and remarkable character of many 

 of these render them very suit ible for cultivation. None of the 

 abnormal forms have as yet been found in America, probably 

 meiely because they have not been looked for. 



Camptosorus. 



0. rhizophyllus Pre>l. — Frond lanceolate, brOad and hastate, 

 or cordate at base, attenuated towards the tip, which strikes root 

 and give> rise to a new plant; hence this fern is called the Walk- 

 ing Leaf; fronds evergreen. Camptosorus rliizophyllus, Link, 

 Presl, A. Gray, Eaton, Hooker. Asplenium rkizopliyllum, Linn, 

 in part (Linnaeus's name included Fadyena prolifera, a totally 

 different plant), Michaux, Pursh, Fl. Am. Sept. ii, p. QQiQ, Bige- 

 low, Torrey, Beck, Darlington, Lowe's Ferns, vol. v, pi. 14 a. 

 Antlgramma rhizophila, J. Sm., Torrey, Fl. N. Y. ii. p. 494. 

 Camptosorus ramlcifoUus, Link. — On the flat perpendicular face 

 of a rock in the woods, on the Spike's Corners side of the mills 

 at High Falls, township of Portland, C. W., July 1862. In a 

 rocky wood, a mile north-west from the Oxford station of the 



