The English flora - SeaweedAfrica

136 LICHENES.
c. Thattus shrubby, rounded, usually much branched, mostly erect.
ot. Solid. Apothecia globose, filled with a black powder (cistidce)
or solid.
Fam. XVI. Sph^rophore^:.
34. Isidium. Thallus crustaceous, spreading-, adnate, bear-
ing- solid erect branches (or podetia 1
?) Apothecia orjbicular, convex,
at length subglobose, solid, terminal upon the podetia and
more or less sunk in the extremity, so as to
the substance of the podetium.
leave a border of
35. SpH/EROPHorox. Thallus crustaceo-cartilaginous, branched,
suifrnticose, solid within. Apothecia (cistulce) subglobose,
sessile, terminal on the branches of the thallus and formed of it,
breaking with a torn margin and containing within a pulveru-
lent black mass collected into a ball.
36. Stereocaulon. Thallus cartilaginous or somewhat
woody, branched and fruticulose. Apothecia turbinate, sessile,
solid, plane, scarcely rising above the border; the disk at length
spreading, covering the border and reflexed.
(3. Thallus (or podetium ?) fistulose. Apothecia hemispherical,
fleshy (cephalodia).
Fam. XVII. Cladonie^e.
37. Cladonia. Thallus somewhat shrubby, branched, rarely
simple, leafy with scales which are at length often evanescent
branches (>podetia, Ach.) cartilaginous, rigid, fistulose, all attenuated
and subulate, divided, fertile, generally perforated in the
axils. Apothecia (cephalodia) sessile, orbicular, convex, capituliform,
not bordered, fixed by the circumference, free beneath
in the centre, the sides reflexed, uniform within. (Fee).
38. Scyphophorus. Thallus foliaceous, imbricated ; podetia
fistulose, cylindrical, dilated upwards, bearing cups, or attenuated
and subulate, cups closed with a membrane, or cleft at the
extremity, often rayed in a somewhat digitated manner, the
rays all fertile. Apothecia (cephalodia) convex, capitnliform,
not bordered, free in the centre beneath, arranged around the
edges of the cup, the margin reflexed, uniform within. (Fee).
39. Pycnothelia. Thallus subcrustaceous, uniform; pode-
tia (mostly simple short) hollow. Apothecia (cephalodia) or-
bicular, not bordered, capituliform, thickened, inflated beneath,
terminal, reflexed at the margin, uniform within. (Fee).
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