THE ASCOMYCETES OF OHIO V 
357 
scattered over the upper surface, the lower surface ash-white to cream- 
colored, with a network of veins of the same color, with similarly colored 
rhizoids extending downward; medulla of small, densely interwoven and 
irregularly extending hyphae; apothecia somewhat digitately clustered on 
the narrow lobes, small, 1. 3 to 3 mm. in diameter, orbicular, flat or semi¬ 
revolute, dark brown; hypothecium light brown; hymenium hyaline below 
and brown above; asci long-clavate; spores acicular, 6-to 8-celled, 53 to 66 
mic. long and 3 to 3.5 mic. wide (Fig. 8, b). 
Examined from Butler and Lake counties. On damp earth and 
mossy rocks. Not previously reported from Ohio, and probably not 
widely distributed in the State. Surely rare. 
4. Peltigera canina (L.) Hoffm. Deutsch. FI. 2: 108. 1795. 
Lichen caninm L. Sp. PI. 1149. 1753. 
Thallus closely adnate toward center, the lobes more or less ascend¬ 
ing, 6 to 15 cm. in diameter, the upper surface for the most part thickly 
covered with trichomatic hyphae, generally giving it a downy appearance 
under the lens, the lobes numerous and usually broad and rounded, with 
entire or crenate and much crisped margins, usually green-gray but some¬ 
times becoming brown, below almost white, netted with light brown or 
gray veins, these bearing rhizoids of the same color; medulla (Fig. 5) of 
densely interwoven and irregularly disposed hyphae; apothecia on narrow, 
extended lobes, often erect, orbicular, usually revolute, 2 to 7 mm. in 
diameter, the disk dark brown; hypothecium (Fig. 7) pale brown; hy¬ 
menium (Fig. 6) pale below and brown above; asci long-clavate; spores 
acicular, straight or sometimes curved, 4- to 8-celled, 30 to 65 mic. long 
and 3 to 5 mic. wide (Fig. 8, d). 
Examined from Butler, Franklin, Ashtabula, Green, Seneca, Summit, 
Lorain, Preble, Brown, and Adams counties. On soil or mosses in woods. 
Generally distributed and frequent in Ohio. 
5. Peltigera rufescens (Neck.) Hoffm. Deutsch. FI. 2: 107. 1795. 
Lichen rufescens Neck. Meth. Muse. 79. 1771. 
Thallus closely adnate at the center with ascending lobes, 5 to 15 cm. 
in diameter, the upper surface smooth and devoid of trichomatic hyphae 
for the most part, but the margins sometimes sparingly covered with them, 
green-gray to brown, the lobes crowded, rather small with crenate, much 
crisped, elevated margins, the lower surface usually becoming dark brown 
except at the margins, and thickly reticulated with brown veins, from 
these numerous rhizoids of similar color extending; medulla of densely 
interwoven variously disposed hyphae; apothecia numerous on narrow, 
extending lobes, the disk brown to black-brown, revolute, 4 to 7 mm. in 
diameter; hypothecium pale brown; hymenium hyaline to pale brown below 
and dark brown above; asci long-clavate; spores acicular, straight or curved, 
4- to 8-celled, 45 to 68 mic. long and 3.5 to 5 mic. wide. 
