Fig. 191. Section of one of the gills of A. campestris.

a. Sporophores surmounted by spicules bearing spores. Link [Icones Selectae Anatomico-Botanicae, Fasc. iii. Berlin, 1841.] terms these bodies small tubes with stalked granules (antheridia).
b. Small tubes with transverse septa. According to Link they become spores.
c. The central vesicular tissue.

This image is from Mushroom in Pereira's Elements of Materia Medica and Therapeutics, 1854.