Fig. 002. Claviceps purpurea.

A. Young sclerotium.
c. with old sphacelia.
s.p. The apex of the dead ovary of rye.
B. Upper part of A, in longitudinal section, showing sphacelia.
C. Transverse section through the sphacelia, more highly magnified.
m. The mycelium, surrounded with the hyphae.
b. Bearing conidia.
p. Conidia fallen off.
w. The wall of teh ovary.
D. Germinating conidia, forming spiridia, x.
—(Bachs.)

This image is from Ergota in Sayre's Manual of Organic Materia Medica and Pharmacognosy, 1917.