The Mesomycetes are intermediate forms between the Phycomycetes and
the Higher Fungi. In the vegetative organs, and in the multicellular
hyphæ, they resemble the Higher Fungi; the methods of reproduction,
however, show the characters of the Phycomycetes, namely sporangia
and conidiophores of varying size and with varying number of spores;
definite and typically formed asci and basidia are not present. Sexual
reproduction is wanting. The HEMIASCI are transitional between the
Phycomycetes and the Ascomycetes, the HEMIBASIDII (Brand-Fungi) form
the transition to the Basidiomycetes.