SLOssonN: ONE OF THE HYBRIDS IN DRYOPTERIS 203 
its sori, often nearer the midveins than in D. crisiata x marginalis; 
and as a rule by its scales, which usually have dark centers, while 
those of D. cristata x marginalis appear uniformly light brown, so 
far as observed. But dark-centered scales do occur sometimes in 
D. marginalis, so are to be looked for in any of its hybrids. They 
are common in Dryopteris marginalis x spinulosa (D. pittsfordensis), 
In 1902 Mr. George E. Davenport described in Rhodora* an 
anomalous plant as baffling identification, but suggested it might 
prove to be D. Clintoniana x marginalis. 1 have seen only scraps 
of pinnae of this plant, and have not been able to find out if other 
specimens are now in existence. Neither these scraps nor the 
published description of the plant tallies with anything I have seen 
that appeared unmistakably D. Clintoniana x marginalis, and it 
does not seem probable that the plant can have been this hybrid. 
I am indebted to Dr. Ezra Brainerd, Dr. Philip Dowell, Mr. 
Ralph C. Benedict, and Mr, Harold G. Rugg for the privilege of 
examining material. 
New York CITY. 
* 4: 10-13. 
