76 Pretz: FLoRA oF LeHnicH County, PENNSYLVANIA 
SELAGINELLA APuS (L.) Spring. 
General throughout, in moist, springy and often marshy, open 
meadows and bogs. Usually abundant. Collected on wet 
“‘shale’’ outcrops along the Jordan Creek, 11% miles northwest of 
Kernsville, November 6, 1910, 3700. Collected in fruit on August 
25. A conspicuous species in late fall and early winter among the 
grasses in the open meadows. Evergreen. Has been found in 
January apparently as fresh and untouched by the cold as earlier 
in the season. 
IsOETES CANADENSIS (Engelm.) A. A. Eaton 
Collected along the Lehigh River, about a mile above Bethle- 
hem, in August, 1882, Eugene A. Rau. This plant, which Mr. 
Rau has told the writer was originally collected by Elias Durand, 
the Philadelphia botanist, on a trip up the Lehigh River, was 
referred to “J. Engelmanni A. Br.” but changed later. A note on — 
Mr. Rau’s label refers to the TorrEY BULLETIN for June, 1903.* 
In this list variation has not been especially emphasized. The 
writer has collected in the county many forked fronds of ferns” 
of different species, plants of Botrychium obliquum Muhl. with 
two or even three fertile fronds, etc., which may be considered 
abnormal growths and of which it is unnecessary to make any 
particular mention. 
What has been said in reference to the Botrychiums applies 
even better to the genus Dryopteris or more properly to that 
division characterized as the ertstata-marginalis-spinulosa group. 
Contributions concerning the hybrids of this group are to be found 
in current botanical literature. These contributions contain also 
many observations relating to the described species themselves and | 
materially advance the knowledge of the group. Allof the members 
of the group indigenous to this region, excepting D. Goldiana, 
which is rather local, are to be found more or less evenly distributed 
ina number of habitats in the South Mountain range. In view of 
the acknowledged difficulty of the group, with particular reference 
to its hybrids, the writer has made little mention of the variation 
to be found. As to the identity of the material cited, the writer 
* Bull. Torrey Club 30: 359-3 62. 11 Je 1903. 
