EXPLANATION OF THE PLATES. 273 
Fig. 13. Agaricus coprophilus. Hymenothecee. 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. 
b. Fringed edge, taken by Micheli for stamens, and by 
Hedwig for stigmata. 
c. Seminules separated from the gill, which served them 
asaplacentarium. 4.,,.... 
Fig. 15. Spheria. / Sarcothalamece. A part of the plant 
cut vertically, and magnified. Lo f/3 
a. Spherules ovoid, enchased inthe stroma. /~ 
5. Strome upon the bark of a tree. 
Fig.16. Calycium spherocephalum. Idiothalamee. En- 
tire plant magnified. A. ¢b2 
a. Thallus adherent on bark of old trees, very thin, 
scarcely visible. 
b. Podetion simple, upright, black. 
c. Pileus topshape, black. , fh, pe S02. 
Fig. 17. Opegrapha. _Idiothalamece. Entire plant mag- 
7 
~ 
_ nified. 
a. Thallus adherent on the bark of trees, crustlike, flaky, 
thin, split, irregular, whitish. 
b. Lirelles branchy, black. 
Fig. 18. Umbilicaria murina. Coeenothalamee. Entire 
plant magnified. hi. EOS 
a. Thallus free, membranaceous, leatherlike, wavy, 
brown. 
b. Gyromes sessile, hemispherical, black. 
darcotk, tg 875. 
Se ee ee 
Care 06 Fab LON JO fp (9-28. 
Pe ri 
WOL. I. as 
