64 Pretz: FLora or LenicH County, PENNSYLVANIA 
south to southwest of Macungie, November 13,1910. Streamlet 
3 mile east of Shimersville, November 13, 1910, 3129; streamlet 
1°4 miles southeast of Emaus, same date, 3732. 
_ This species is of such frequent occurrence on the South 
Mountains that it may be expected throughout in wet boggy 
situations, though apparently absent from some areas and portions 
of others. It is abundant at the Saegersville station, where, grow- 
ing in a deep shaded boggy area, it inclines to luxuriance as it does 
at places on the South Mountains. Found in open as well as shaded 
situations. Fronds 8.8 dm. (3.2+5.6) long and 1.3 dm. wide 
represent maximum luxuriance. Fruits late in June. Sterile 
fronds evergreen, the fertile lasting into late fall or early winter. 
Variable. 
DRYOPTERIS CRISTATA X MARGINALIS Davenp. 
General vicinity of streamlet at Mountainville, 1900, Hamm. 
Streamlet 14 mile east of Mountainville, June 22, 1901, 74. In 
bog and along streamlet 174 miles southwest of Mountainville, 
July 13, 1907, 6z5a. Boggy area 14 mile south of Saegersville, 
June 20, 1908, 1272). General vicinity of bog 1 mile south to 
southwest of Mountainville, November 12, 1910, 3171; correspond- 
ing area about 14 mile west, 3774. Along road about 7% mile 
south to southwest of Macungie, November 13, I9lO, 3175. 
Vicinity of streamlet 134 miles southeast of Emaus, November 13, 
1910, 3133. | 
This hybrid, as the stations show, is widely distributed on the 
South Mountains and it is quite safe to say that it may be expected 
throughout in favorable habitats where its putative parents are 
present. Rare at all of the stations, though at some of the stations 
on the South Mountains a number of plants are present. Mostly 
in shade but has been collected in the open. One fertile frond 
10.4 dm. (2.7+-7.7) long and 2.3 dm. wide has been collected but 
represents rather above maximum luxuriance. Fruits late in 
June. Fronds early prostrate, the sterile of some plants lasting 
well through the winter. Fertile fronds perhaps hardier than those 
of D. cristata. 
In general the fronds collected in the county have been re- 
markably regular in outline and usually offer little difficulty in 
