—6— 



Common throughout in woods and pastures both dry 

 and moist, often forming large colonies. 



Onoclea sensibilis L. Sensitive Fern. Common 

 Throughout in low fields and in swamps. The form with 

 the same frond, part sterile and part fertile, called var. 

 obtusilobata sometimes occurs. 



Onoclea Struthiopteris Hoffrn. Ostrich-fern. Fre- 

 quent in alluvial soil along the Connecticut and Housa- 

 tonic rivers and their larger tributaries ; rare elsewhere. 



SCHIZ^ACE^. 



Lygodium palmatum Swartz. Hartford Fern ; 

 Climbing Fern. Occasional or rather local in moist 

 thickets and open woods, usually in sandy soil. 



OSMUNDACE^. 



Osmunda regalis L. Flowering Fern. Frequent 

 throughout in low thickets, wet pastures and meadows 

 and along streams. 



Osmunda Claytoniana L. Interrupted Fern. In 

 old pastures, along fence^rows and in open woodlands, 

 frequent throughout. 



Osmunda cinnamomea L. Cinnamon Fern. Com- 

 mon in wet thickets and swamps and in boggy ground. 

 A form occurs with the pinnae of the sterile fronds more 

 or less cut, called var. incisa. 



OPHIOGLOSSACE^. 



Ophioglossum vulgatum L. Adder's-tongue. Moist 

 meadows and old pastures throughout. Considered 

 rare, but probably more frequent than usually supposed, 

 as the plant is very inconspicuous in the field. 



Botrychium simplex Hitchcock. Small Grape-fern. 

 Rarely reported. It grows in moist woods in leaf 

 mould sometimes with B. matricaricefolium and B. lan- 

 ceolatum. The plant listed in the Berzelius Catalogue 

 as B. Lunaria evidently belongs here, and probably also 



