EXPLANATION OF THE PLATES. 
273 
Fig. 13. Agaricus coprophilus. Bymenothecece . Plant 
cut vertically^ 
a. Stem pipelike. 
b. Pileus lamellar beneath; gills radiated, scytheshape, 
unequal. 
c. Umbilicus. 
Fig. 14. Part of a gill of the same, very much magnified. 
a. Seminules. 
1. Fringed edge, taken by Micheli for stamens, and by 
Hedwigfor stigmata. 
c. Seminules separated from the gill, which served them 
as a placentarium. 
Fig. 15. Sphseria. Sarcolhalamece. A part of the plant 
cut vertically, and magnified. 
a. Spherules ovoid, enchased in the stroma. 
b. Strome upon the bark of a tree. 
Fig. 16. Calycium sphaerocephalum. Idiot halameai. En« 
tire plant magnified. 
a. Thallus adherent on bark of old trees, very thin, 
scarcely visible. 
b. Podetion simple, upright, black, 
c. Pileus topshape, black. 
Fig. 17. Opegrapha. Idiot halamece. Entire plant mag- 
nified. 
a. Thallus adherent on the bark of trees, crustlike, flaky, 
thin, split, irregular, whitish. 
b. Lirelles branchy, black. 
Fig. 18. Umbilicaria mu r in a. Ccenothalameoe. Entire 
plant magnified. 
a. Thallus free, membranaceous, leatherlike, wavy, 
brown. 
b. Gyromes sessile, hemispherical, black. 
VOL. I. 
1 ' 
