PRETZ: FLORA OF LEHIGH CoUNTY, PENNSYLVANIA 61 
a better understanding of the group and very probably affect a 
revision of this list materially. 
BoTRYCHIUM TENEBROSUM A. A. Eaton 
Along streamlet above Mountainville, July 4, 1900, Dowell 830. 
Along second streamlet 124 miles southwest of Mountainville, 
July 13, 1907, 604. Both stations are on the South Mountains. 
Edge of a bog, on a spur of the South Mountains along the Lehigh — 
River, 1144 miles northwest of Strassburg (S.E. Allentown), 
July 4, 1908, 7375. 
Practically absent from the original station detected by Dr. 
Dowell but still occurring sparingly at the stations later detected 
by the writer. It has been collected in good condition as early 
as June 6 and as late as July 24. At this time B. neglectum was 
withering or had disappeared. The third station was visited again 
on May 28 of this year [1910] and several plants were found coming 
up. Plants ranging from 4.5 cm. to 18 cm. in height have been 
collected. One plant with some portions of the sterile segment 
fruiting has been collected. 
BoTRYCHIUM VIRGINIANUM (L.) Sw. 
General throughout, on all soils and formations. Frequently 
abundant. The writer has a record of a plant standing 8 dm. high 
from ground to top of the erect sporophyl. This represents above 
maximum luxuriance, the plants in luxuriance being usually some- 
what lower. Collected as early as May 30 but is mature in the 
middle of June. Herbaceous, the sterile segment lasting well 
into fall. 
CAMPTOSORUS RHIZOPHYLLUS (L.) Link 
On gneissic rocks, on a spur of the South Mountains, 74 mile 
northeast of Strassburg ( S. E. Allentown), September 7, 1907, 
898. On gneissic rocks, Big Rock, 1 mile southeast of Moun- 
tainville, October 12, 1907, 2032. On Hardyston sandstone, 
1% miles southwest of Mountainville, May 9, 1908. On gneissic 
rocks, Idlewild, Mountainville, 1909, E. S. Mattern. On gneissic 
rocks, Powder Valley, August 28, 1910, 2892. On gneissic rocks, 
1 mile southwest of Macungie, November 13, 1910, 3779. 
All of the above stations are on the South Mountain range. 
