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Answer:
white button mushroom
Mushroom spawn is simply any substance that has been inoculated with mycelium, the vegetative growth of a fungus. ... The spawn is used to transfer mycelium onto any material from which mushrooms will grow, called a substrate.
Casing is large diameter pipe that is assembled and inserted into a recently drilled section of a borehole. Similar to the bones of a spine protecting the spinal cord, casing is set inside the drilled borehole to protect and support the wellstream. The lower portion (and sometimes the entirety) is typically held in place with cement.[1] Deeper strings usually are not cemented all the way to the surface, so the weight of the pipe must be partially supported by a casing hanger in the wellhead.