PretTz: FLorRA OF LEHIGH COUNTY, PENNSYLVANIA 65 
identification in the field. Material collected previous to August, 
1907, by Mr. Hamm and the writer, lay undetected and not defin- 
itely assigned until identified by Dr. Dowell, who visited the 
writer at that time for the purpose of collecting this hybrid growing 
in the open. While the measurement given is unusual, clumps of 
this hybrid occur in which the fronds incline to luxuriance and do 
not fall far short of these figures. 
DryopTerts GOLDIANA (Hook.) A. Gray 
Boggy area and along streamlet 114 miles northwest of Strass- 
burg, Krout; July 14, 1907, 639. Along streamlet 12@ miles south- 
west of Locust Valley, J. S. Moyer; September 12, 1909, 2785. 
Along streamlet I mile south by southeast of Spring Valley, May 
15, 1900, C. N. Lochman. 
Gaining in abundance at the first named station and fairly 
abundant at the second, where the trees have been cut from the 
low area on which the species grows. The second station, dis- 
covered by Dr. I. S. Moyer, the Bucks County botanist, is that of 
the published record in the Bucks County lists. The station is 
very close to the county line butin Lehigh. Bucks has however an 
authentic record of this species from Buckwampum. One frond 
11.9 dm. (4.8+7.1) long and 5.5 dm. wide, representing rather 
above maximum luxuriance, has been recorded from the first sta- 
tion, where however the species rather inclines to Juxuriance. Col- 
lected with mature fruit on July 4. Herbaceous, withering early 
but still green in November, though usually prostrate at that time. 
Apparently, this species is local in its distribution in this region. 
DRrYOPTERIS INTERMEDIA (Muhl.) A. Gray 
General throughout, on all soils and formations in moist 
situations, sometimes in niches on rocks and outcrops. Frequent 
and most abundant on the South Mountains. Fronds 6.6 dm. 
(2.1+4.5) long and 2.6 dm. wide represent average luxuriance. 
Collected with ripe fruit on June 20. Evergreen, lasting through | 
the winter but early prostrate. 
DRYOPTERIS INTERMEDIA XMARGINALIS Benedict 
A fine plant of this hybrid was discovered in a low, moist 
shaded area in the vicinity of the abandoned mine holes along 
