FLORA OF THE UPPER SUSQUEHANNA. 13& 



J 



their segments contracted into berry-like bodies which enclose 

 the fruit. The fertile fronds remain erect through the win- 

 ter. The so-called variety obtusilobata is occasionally found. 

 In appearance it is half-way between the fertile and sterile 

 fronds of this species. 



O. Struthiopterls (L.) Hoffm. Ostrich Fern. Abundant. Found 

 in alluvial soil along our larger streams. Fronds in a circular 

 clump, often twenty or more from the same root, pinnate, the 

 divisions pinnatifid. The fertile fronds appear late in summer 

 from the midst of the sterile ones, much different in appearance. 

 The rootstock produces long, slender stolons, which torm 

 new plants at their ends. Our tallest and handsomest fern. 



WOODSIA R. Br. 



W. Ilvensis (L.) R. Br. Ri stv Polvi-od. Exposed rocks, sum- 

 mit of Mt. Markham, Unadilla Forks, Brown. The only station. 



W. obtusa (Spreng. ) Torr. OniusE Wo'mi«si.-v. Rare. Found 

 occasionally on the rocky walls along the Susquehanna below 

 Towanda. Clute. Elsewhere not reported. In aspect this is 

 much like Cystopteris fragilis, and at first glance might be 

 mistaken for that species. 



DICKSONIA L'Her. 



D. punctilobula {^Nlichx. ) A. Gray H.w-Scentkd Fer.n. Fine- 

 H.viREii MOUNTAIN Fern. Plentiful. Found in open woods and 

 thickets especially in uplands. Fronds two or three feet long, 

 very finely cut, usually growing in dense patches. Fragrant in 

 drying. {D. pilosiusciila Willd. ) 



LYGODIUM Su-. 



L. palmatum (Bernh. ) Sw. Climdinc. Fern. "McDonough. 

 Chenangocounty ( J/rjT. Z). i?. Fitch.) This is the second station 

 in which this fern has been found in our State." — Annual Re- 

 port State Botanist, iSgj. 



OSMUXDA L. 



O. regalis L. Flowerin(; Fern. Roval Fern. Plentiful in 

 swamps and wet, open woodlands, often growmg in shallow 

 water. Fronds very smooth, twice pinnate, the pinnules oblong. 

 Fruit borne m a panicle at the summit of some of the fronds. 



