140 



The Canadian Field-Naturalist 



[Vol. XXXIV. 



been gathered within an area of four square miles, 

 which area could still further be reduced to three 

 square miles if we except Woodsia glabella. In the 

 United States a friendly rivalry exists as to which 

 State holds the record for the best fern localities. At 

 present the State of Vermont which adjoins our 

 County of Stanstead claims premier honors (the 

 same as it does for the orchids,) having three locali- 

 ties, Willoughby Lake, Dorset and Manchester 

 where thirty-five, and Pittsford, where thirty-four 

 true species of ferns have been collected. Iii view 

 of this it has recently been said that apparently only 

 Vermont can compete effectively with Vermont, a 

 statement which I hope ere long to refute, seeing that 

 my list of true ferns for Hatley now stands at twenty- 

 eight species, and this for only two years work, 

 whereas most, if not all, of the above lists have been 

 in the making for over twenty years. It seems 

 strange in view of Gosse's diversified love of natural 

 history subjects, he should have entirely ignored the 

 ferns, for we find no mention whatever of them in 

 his "The Canadian Naliiralist," 1840, written whilst 

 residing in these parts from 1835-38. 



In conclusion, my best thanks are due to Mr. 

 William R. Maxon, who after the death of Mr. 

 James M. Maccun, kindly undertook to verify my 

 determinations, and who in many other ways has 

 given me much valuable help and assistance which 

 has greatly facilitated the writing of this paper. To 

 Dr. Harvie I am indebted for the information re- 

 garding the geological formation of this district, and 

 for naming samples of rock submitted. 



List of the Ferns of Hatley, 1920. 



POLYPODIACE;t. 



Pohpod'.um vulgare L. Common Polypody. 



Adianium pedatum L. Maidenhair. 



Pleridlum latiusculuni (Dcsv.) Maxon. Common 

 Brake, Bracken. 



Ath})riurn angusiij olium (Michx.) Milde. Nar- 

 row-leaved Spleenwort. 



A thorium acrostichoides (Sw.) Dicls. Silvery 

 Spleenwort. 



Alh])rium anguslum (Willd.) Prcsl. Lady Fern. 



Pol^stichum acrostichoides (Michx.) Schott. 

 Christmas Fern. 



Polystichum acrostichoides var. Scheinitzii (Beck) 

 Small (var. incisuni Gray). 



Polystichum Braunil (Spcnner) Fee. Braun's 

 Holly Fern. 



Thclypteris palustris Schott. Marsh Fern. 



Thclypleris noveboracensis (L.) Nicuwl. I.e. New 

 York Fern. 



Thelypteris Phegopteris (L.) Slosson. Long 

 Beech Fern. 



Thelypteris hexagonoptera (Michx.), n. comb. 

 Broad Beech Fern. 



Thelypteris Dryopleris (L.) Slosson. Oak Fern. 



Thel^pteris marginalis (L.) Nieuwl. I.e. Marginal 

 Shield Fern. 



Thel^pteris marginalis var. elegans J. Robinson. 



Thelypteris Coldiana (Hook.) Nieuwl. I.e. 

 Goldie's Fern. 



Thel])pteris Boottii (Tuckerm.) Nieuwl. Boot's 

 Shield Fern. 



Thelypteris cristata (L.) Nieuwl. I.e. Crested 

 Shield Fern. 



Thelypteris cristata, var. CUntoniana (D. C. 

 Eaton), n. comb. Clinton's Wood Fern. 



Thelypteris tpinulosa, var. intermedia (Muhl.), 

 n. comb. Spinulose Wood Fern. 



Thelypteris splnulosa, var. americana (Fisch.), 

 n. comb. Spreading Wood Fern. 



C^stopteris bulbifera (L.) Bernh. Bulblet Bladder 

 Fern. 



Cystopteris fragilis (L.) Bernh. Fragile Bladder 

 Fern. 



Woodsia glabella R. Br. Smooth Woodsia. 



Dennstaedtia punctilobula (Michx.) Moore. 

 Hay-scented Fern. 



Onoclea sensibilis L. Sensitive Fern. 



Onoclea sensibilis var. obtusilobata (Schkuhr.) 

 Torr. 



Pteretis nodulosa (Michx.) Nieuwl. Ostrich 

 Fern. 



OSMUNDACE/E. 



Osmunda regalis L., var. spectabilis (Willd.) 

 Gray. Royal Fern. 



Osmunda Claytoniana L. Interrupted Fern. 

 Osmunda cinnamomea L. Cinnamon Fern. 



OPHIOGLOSSACE/E. 



Ophioglossum vulgatum L. Adder's tongue. 



Botrychium Lunaria (L.) Sw. Moonwort. 



Botrychium ramosum (Roth.) Aschers. Matri- 

 cary Grape Fern. 



Botryclnum obliquum Muhl. Common Grape 

 Fern. 



Botrychium obliquum var. elongatum Gilbert & 

 Habcrcr. 



Botrychium obliquum var. dissectum (Spreng) 

 Clute. Feathery Grape Fern. 



Botrychium obliquum var. oneidcnse (Gilbert) 

 Waters. 



Batrychium ternatum (Thunb.) Sw., var. inter- 

 medium D. C. Faton. Tcrnate Grape Fern. 



Botrydnum virginianum (L.) Sw. Rattlesnake 

 Fern. 



