Description Geastrum saccatum



specimen tasmania, australia


the immature fruiting body 0.6 2.5 centimetres (0.24 0.98 in) in diameter , 0.8 1.5 centimetres (0.31 0.59 in) tall. initially, fruiting body egg-shaped–similar in appearance puffballs–and has strands of mycelia (rhizomorphs) @ base attach growing surface. skin, or peridium, composed of 2 separate layers: outer layer (exoperidium), golden tan yellowish-brown color, separates away inner basidiocarp , splits several rays curve backward (recurve) base. mushroom 2 5 centimetres (0.79 1.97 in) in diameter after rays have expanded. unlike other members of genus geastrum (such geastrum fornicatum) arms not push basidiocarp off ground; rather, lies flat. inner spore-bearing basidiocarp 0.5 2 centimetres (0.20 0.79 in) broad, , has central pore surrounded circular dull-brown apical disc; disc distinctly ridged or depressed. inside of interior sphere white when young, matures mass of brown, powdery spores mixed thick-walled fibres known capillitium.



a fresh specimen of geastrum saccatum.


spores

the spores rounded, warts, , have dimensions of 3.5–4.5 µm.








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