o 5 mic. wide.

Examined from Franklin, Adams, Butler, Marion, Jefferson, and Preble
counties. On soil, old logs, and moss in woods. Not previously reported
from Ohio, but included under _Peltigera canina_ and _Peltigera
rufescens_. Evidently widely distributed and frequent in the State, but
seldom fruited.

3. Peltigera sorediata (Schaer.) Fink comb. nov.

_Peltigera canina spuria sorediata_ Schaer. Enum. Lich. Eur. 21. 1850.

Thallus small, composed of scattered lobes, these 1 to 4.5 cm. in
length, adnate with slightly ascending rounded, and crenate margins, the
upper surface usually deep gray at the center, becoming lighter toward
the margin, thickly covered with trichomatic hyphae, orbicular sorediate
areas 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. Fl. 2: 108. 1795.

_Lichen caninus_ L. Sp. Pl. 1149. 1753.

Thallus closely adnate toward center, the lobes more or less ascending,
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
sometimes 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;
hymenium (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