Physarum album (Knikkend kalkkopje (BE) / Baumwoll-Stielkügelchen (DE) /No other common names found ) is a slime mold in the Physaraceae family. Yesterday I showed the immature fruiting bodies. More info on the the life cycle of the slime molds can be found there.
In this image (again with 150mm macro + 2x Extender) you can see the mature fruiting bodies ready to release the spores. The most important characteristic of all the species within this family is the presence of lime (calcium carbonate) deposits, which may occur in the peridium, capillitium, or stalk of the fruiting body. The spore mass colour is normally dark brown to purple-brown to black.
Image: Kalmthout (Be) - 01/10/2010
© Johan Dierckx
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