The MYCOMYCETES are not entirely aquatic in habit; they have hyphæ with
_transverse walls_, but _no sexual reproductive organs_. The asexual
reproduction takes place in very different ways; by endospores (in
asci), conidia, basidiospores, chlamydospores, and oidia. Swarmspores
are never found.
Two chief methods of reproduction may be distinguished, and hence the
class may be divided into two large sub-classes:--the ASCOMYCETES (with
asci), and the BASIDIOMYCETES (with basidia).