1.
A. Exterior skin, bark, rind, cortex, scurf, warts, spines, bristles—peridium. Plants with long spines—echinate.
B. Inner rind or true peridium. [A.B.—peridia (plural of peridium).]
C. Columella—those filaments springing from the base and rising, which do not unite freely with those issuing from the inner peridium. This mass of threads is usually conical, but sometimes globose.
D. Capillitium—a soft mass of cottony threads interspersed with minute dust-like spores; the space occupied is called the gleba.
E. Coarse empty, sterile cells. The space they occupy is called the subgleba.
F. Echinate spores magnified.
G. Spines (magnified) which fall off and leave the inner peridium exposed.