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EXPLANATION OF THE PLATES. 273
Fig. 13. Agaricus coprophilus. Hymenothecece. Plant
cut vertically.
a. Stem pipelike.
b. «Pileus lamellar beneatli; gills radiated, scytheshape,
unequal.
c. Umbilicus.
Fig. 14. Part of a gill of the same, very much magnified.
a. Seminules.
h. Fringed edge, taken by Micheli for stamens, and by
Hedwig for stigmata.
c. Seminules separated from the gill, which served them
as a placentarium. y, ^. ,•
Fig. 15. Sphsdna.^Sarcothalamece. A part of the plant
cut vertically, and niagnified. / /y -
a. Spherules ovoid, enchased in the stroma. /^"
b. Strome upon the bark of a tree.
Fig. 16. Calycium sphaerocephalum. Idiothalamece. Entire
plant magnified. ,«. ^/.^
a. Thallus adherent 6n bark of old trees, very thin,
scarcely visible.
b. Podetion simple, upright, black.
c. Pileus topshape, black. j^Xf. ^ 'jT^
Fig. 17. Opegrapha. Idioinalaniecc. Entire plant mag-
jnified.
^
a. Thallus adherent on the bark of trees, crustlike, flaky,,
thin, split, irregular, whitish.
h. Lirelles branchy, black.
Fig. 18. Umbilicaria murina. Coenothalamece. Entire
plant magnified. ' - r.'^J'
a. Thallus free, membranaceous, leatherlike, wavy,
brown.
I. Gyromes sessile, hemispherical, black.
VOL. I.