— lOI — 
The specimens reported in the following list are all in the Herbarium of the 
Carnegie Museum, where most of the work on my thesis was done. Many of 
the specimens were named a few years ago by Mr. G. K. Merrill, the Usneas 
having been named by Dr. R. Heber Howe, Jr. Of the other specimens reported 
on in this list, about half of the total number, the identifications were accomplished 
during the course of my studies, and, of these latter specimens, about half were 
examined and checked-over by Prof. C. C. Plitt, to whom many thanks are due. 
A few specimens which did not appear in my thesis are included in the following 
list: 
1. Endocarpon aquaticum A. Zahlbr., Krypt. Exsicc. 1901. On more or less 
submerged rocks or on earth. Cheat Haven, Fayette Co., Sept. 3, 1910, 
O. E. and G. K. Jennings. 
2. Endocarpon aquaticum euplocum (Ach.) A. L. Sm. On blocks of Homewood 
Sandstone at the bottom of the Conoquennessing Gorge below Ellwood 
City, Beaver Co., Oct. 3, 1914, O. E. Jennings. 
3. Dermatocarpon miniatum (L.) Th. Fr., Lich. Art. i860. On a limestone 
out-crop near Van Emmon, Washington Co., April, 1922, O. E. Jennings. 
4. Amphiloma lanuginosum (Hoffn.) Nyl., Soc. Linn. Bord. 1856. On rocks, 
trees and more rarely on soil. This is probably the most prominent 
lichen in the Pittsburgh district. It has been collected also in the following 
counties: Erie, Crawford, Fayette, and Butler, various collectors. No 
doubt it occurs in the other counties as well. 
5. Graphis scripta (L.) Ach., Lich. Univ. 1816. On black oak, Pymatuning 
Swamp, Linesville, Crawford Co., June 11, 1907, O. E. Jennings. 
6. Coenogonium interpositum Nyl. On limestone in the spring at Bedford 
Springs, Bedford Co. (not submerged), O. E. Jennings. This particular 
locality is well sheltered, so that changes of temperature thruout the year 
are, comparatively, within a small range. Otherwise, most species of 
this genus are tropical or semitropical according to most reports. It has 
been reported from West Virginia from about the same latitude.^ 
7. Biatorella simplex (Dav.) Br. & Rostr., Tidssk. 3: 241. 1869. On sand- 
stone with Lecidea albocoerulescens, Falls Run, Glenshaw, Allegheny Co., 
O. E. Jennings, Sept. 17, 1921. 
8. Lecidea contigua Fr., Sched. Crit. Lich. Exsicc. Suec. 13: 14. 1827. On 
sandstone boulder in ravine across river from Johnetta, Armstrong Co., 
O. E. Jennings, Oct. 3, 192 1; Fern Hollow, Pittsburgh, Allegheny Co., 
G. I. Giardini, Nov. 25, 1921. 
9. Lecidea contigua hydrophila Fr., Lich. Fur. p. 300. 1831. On sandstone 
Ohio Pyle, Fayette Co., O. E. & G. K. Jennings, Sept. 1-3, 1906. 
than was the case before deforestation, and it seems to have occupied the cleared idle lands much 
as has Crataegus among the flowering plants. Here is a good problem for some one to work out — 
Is our lichen flora increasing, and if so, how? — O. E. Jennings 
2 •'Growing with thallus of a Cladonia. Fayette: near Quinnimont {Pollard & Maxon, 141, 
sterile." — C. F. Millspaugh, The Living Flora of West Virginia. W. Va. Geol. Surv.5 : A: P'. 
I: 159. 1913. 
