LICHEN punctiforrnis.
Dot-shaped Tubercled Lichen,
CRYPTOGAMIA Algae.
G en. Char. Male, scattered warts.
Female, smooth shields or tubercles, in which the
seeds are imbedded.
Spec. Char. Crust determined, very thin, smooth,
rusty-brown. Tubercles minute, blacky hemispherical,
umbilicated.
Syn. Lichen punctiforrnis. Ach. Prodr. 18.
L. myacoproides. Ehrh. Crypt. 264.
Y erru c a ria punctiforrnis. Pers. in Ust. Ann. fuse.
1 1 .1 9 . Ach.Meth. 119.
^N^OTICED commonly on the smooth bark of ash-trees, by
Mr. W . Borrer. His specimens agree with those from Acha-
rius and Ehrhart. Were it not for the decision of such consummate
cryptogamists, we should, even by tracing the various
appearances of their own specimens, judge this a variety
of L. analeptus, t. 1848, from which it differs but slightly in
the rather more red or rusty hue of the very thin crust. The
tubercles indeed are still more minute than in that species,
and so much umbilicated as to be occasionally almost cupshaped.
A comparison of the two plates will show the difference
of their forms. In a young state, those of the present
Lichen are, of course, but slightly excavated, but they are
then too small to be confounded with the other.
vM /iy UMa / uddtaAee/