O P E G R A P H A diaphora.
Various-fruited Opegrapha.
CRYPTOGAMIA Alga;.
Gen Char. Seeds in black, linear, sessile, simple or
branched,bordered clefts,in anuninterrupted crust.
Spec. Char. Crust th in , smooth* white. Clefts simple,
elevated, unequal; the largest elongated and wavy.
Syn. O p eg rap h a diaphora. Ach. Meth. 19. Winch.
I v. 2. 30.
O. varia. Per soon in Ust. Ann.fasc. 7. 30.
Lichen diaphorus. Ach. Prodr. 20.
N o t unfrequent on the trunks of trees. We received it
from Mr. Turner, who had previously determined the species,
and we find no essential difference between his specimen and
those of Acharius and Swartz. We confess however very
great difficulty in distinguishing the present species from
O. notha, t. 1890.—The crust is indeterminate, scarcely limited,
thin, either quite smooth or a little scaly, not powdery,
white, scarcely greyish. Clefts rather dispersed, of tjvo different
appearances, either oblong, short and straight; or linear,
elongated, and zigzag. The breadth is nearly equal in all;
they are very black, and their disk becomes by age dilated
and somewhat convex.