—105— 
42. Gyrophora Muhlenhergii Ach. Lich. Univ. 227. 18 10. Single specimen 
occurring on rock from Somerset, Somerset Co., D. R. Sumstine, Aug. 
8, 1906. Mr. G. K. Merrill in 1914 determined this specimen as an un- 
named variety. 
43. Gyrophora Dillenii (Tuck.) Arn., Oesterr, Bot. Zeitschr. 1896: 16. 1896, 
On rocks. Specimens have been collected in four counties: Crawford, 
Westmoreland, Fayette (numerous specimens), and Franklin. 
44. Umbilicaria pustulata (L.) Hoffm., Descr. PI. Crypt. 2: 13. 1794. A single 
specimen on rocks from the top of Stony Mt., Mt. Alto, Franklin Co.^ 
April 23, 1919, O. E. Jennings. 
45. Umbilicaria pustulata papulosa (Ach.) Tuck., Syn. Lich. N. E. yo. 1848. On 
sandstone rocks, Wills Mt., near Hyndman, Bedford Co., Oct. 9, 1904, 
O. E. Jennings, growing together with Gyrophora Dilletm; exposed sand- 
stone rocks on brow of Chestnut Ridge, east of Hillside, Westmoreland 
Co., O. E. Jennings and others. May 25, 1907, and Oct. 11, 1917. 
46. Pannaria ruhiginosa (Thunb.) Del., in Bory. Diet. Class. Nat. Hist. 13: 20, 
1828. Only one specimen in the collections: Bark of Fraxinus nigra. 
along shore of Conneauttee Lake, Edinboro, Erie Co., June 22, 1919, 
O. E. Jennings and J. C. Fetterman. 
47. Sticta amplissima (Scop.) Mass., Mem. Lich. 28. 1853. On tree trunks 
and twigs, rarely on humus. In Center County it was found on Chestnut; 
in Crawford County on Fraxinus nigra; in Fayette County on Red oak; 
in Allegheny County on humus with Parmelia rudecta; and on tree bark, 
Westmoreland County. 
48. Sticta pulmonaria (L.) Schaer., Enum. Lich. Eur. 30. 1850. On bark near 
Carnot, Allegheny Co., J. A. Shafer, 1888-9. (Pr. parte f. hypomela. — 
G. K. Merrill). 
49. Nephroma resupinata (L.) Ach., Lich. Univ. 522. 1810. No data of habitat; 
probably on rock. This single specimen was collected by Kate Stoy in 
Nov. 1889, Chestnut Ridge, near Latrobe, Westmoreland County. 
50. Peltigera aphthosa (L.) Willd., Fl. Berol. Prodr. 347. 1787. Commonly on 
moss and humus. In Washington County it has been found growing to- 
gether with P. canina. Other counties represented by specimens are: 
Allegheny, Fayette, Westmoreland, Clearfield, Mercer and Greene. 
51. Peltigera horizontalis (L.) Hoffm., Deutsch Fl. 2: 107. 1795. On moss and 
humus, Ohio Pyle, Fayette Co., Sept. 10, 1905, O. E. Jennings and G. 
E. Kinzer, and Sept. 1-3, 1906, O. E. & G. K. Jennings. 
52. Peltigera polydactyla (Neck.) Hoffm., Deutsch. Fl. 2: 106. 1795. A single 
specimen from the Pymatuning Swamp, Linesville, Crawford Co., occurring 
on dead wood and mosses, May 18-19, 1905, O. E. Jennings. 
53. Peltigera canina (L.) Hoffm., Deutsch. Fl. 2: 106. 1795. Commonly oc- 
curring with mosses on dead wood or humus, in more or less shaded 
habitats. About 30 different collections from Allegheny, Fayette, Hunt- 
ingdon, Washington, Clearfield, Mercer, Greene, Crawford, Westmoreland, 
Cambria, Armstrong, and Clinton counties. 
