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Looking at fruiting body, nice and fresh, you can never guess, whether the spores will germinate:)
Often they do. Some specimens show practically 100% germination rate at the beginning and some percents after years. Some lose ability to germinate in several days and some never have it. This is common for different orders.
An example: Fuligo growing.
Left : source of the spores:
white aethalium.
Right : result of an attempt to germinate its spores. Dumpbell-shaped microplasmodia or some evil like Alternaria?
(field of view is about 2 mm in diam.)
According to the literature, roughly in a half of cases Fuligo is non-heterothallic.
Then it is possible to obtain plasmodia from a single sporophore.
Bigger one. Amoeboid-shaped. Several days old. First two are about 1/2 mm, third one - 1 mm. Some spores still remain on the surface.
These are grown from spores from a yellow aethalium.
A week old:
Myxamoebae still crawl around (and do not fuse):
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