1904J Slosson, — A New Hybrid Fern from Vermont 75 



lower altitude. Not fruiting; occasionally showing pseudopodia and 

 gemmae. 



Moerckia F/oto7viana (Nees) Schiffn. This species occurs sparingly 

 on a wet bank in the Notch. It is new to New England, and I take 

 the liberty of quoting from information kindly furnished me by Dr. 

 Evans as to its relationships and American occurrence. ''Moerckia 

 Flotowiana (Nees) Schiffn. is a plant which Nees von Esenbeck 

 originally referred to Pallavicinia Lyellii as a variety, and which has 

 until very recently been considered a variety of Moerckia (or Palla- 

 vicinia) Hibernica. Schiffner maintains in a recent paper that the 

 plant is specifically distinct from M. Hibernica. Nees von Esenbeck, 

 in 1838, reported the species from Newfoundland, but it has not 

 since been recorded from eastern America. It occurs in the Harri- 

 man collections from Alaska." 



Nardia crenulata (Smith) Lindb. On bare ground at base in 

 Cheshire, also in Notch. 



Pellia cpiphylla (L.) Corda. Wet ground in various places and at 

 all altitudes. Not conspicuous except when fruiting, in April. 



Plagiochila asplenioides (L.) Dumort. At lower and middle 

 altitudes, especially about beds of small mountain brooks. Leaves 

 entire or denticulate. 



University of West Virginia, Morgantown. 



A NEW HYBRID FERN FROM VERMONT. 

 Margaret Slosson. 



Dryopteris Pittsfordensis, hyb. nov. — Mature sporophyte 

 large, U-2, or more feet tall, resembling that of D. spinulosa dilataia, 

 the young fronds like those of D. marginalis with the lowermost pair 

 of pinnae enlarged, partially evergreen, the sporophylls withering in 

 late autumn. 



Rootstock decumbent, as in D. spinulosa, between which and £>. 

 marginalis the plant is a probable hybrid. Fronds fasciculate, cro- 

 siers densely clothed with pale brown scales; stipes 6-12 inches 

 long, usually about one-third the length of the frond, stramineous, 

 browning with age, especially below, deeply furrowed along the face, 

 and clothed with a mixture of broad, narrowly ovate, and linear-lance- 

 olate acuminate entire or lacerated brown scales, darkest below and 

 often with blackish brown centres, paler and transparent above, 



