Spores are released by dehisce. They lack chlorophyll, and are saprophytic. The gametophyte is monoecious. The sex organs develope from surface cells. Zygote undergoes division.
Outer portion gives rise to the embryonic stem.
The inner portion becomes the foot. The primary stem is a branched rhizome. This developes rhizoids and is what the fungus infects during the mycorrhizal relationship.