The colors of the Thallus and apothecia of Lichens—their causes, and the circumstances which modify and alter them.
apothecia seldom round, usually elongated-ellipsoidal, no capillitium.
Tuck., with much stronger, darker thallus and apothecia on the whole larger.
The position of the apothecia constitutes another distinction.
The apothecia (fig. 7) are stalked and black, but of a lighter colour than the mass of spores forming the nucleus.
