A division by fission followed by Endogenous spore formation, characteristic of the Schizosaccharomycetes.
Previously to Hansen's work the only way of differentiating I Hansen found there were three species of spore-bearing Saccharomycetes and that these could be subdivided into varieties.
Also bears tubers; the D, Spore showing the two spiral vegetative shoots have bands of the perinium.
Some shoots are sterile while others are fertile, bearing at the apex the so-called fructification - a dense oval, oblong conical or cylindrical spike, consisting of a number of shortly-stalked peltate scales, each of which has attached to its under surface a circle of spore-cases (sporangia) which open by a longitudinal slit on their inner side.
The spore-cases remain after the plant is dried up and withered.