 Young specimens of A. hygrometricus have roughly spherical fruit bodies that typically start their development partially embedded in the substrate . A smooth whitish mycelial layer covers the fruit body , and may be partially encrusted with debris . As the fruit body matures , the mycelial layer tears away , and the outer tissue layer , the exoperidium , breaks open in a star @-@ shaped ( stellate ) pattern to form 4 – 20 irregular " rays " . This simultaneously pushes the fruit body above ground to reveal a round spore case enclosed in a thin papery endoperidium . The rays open and close in response to levels of moisture in the environment , opening up in high humidity , and closing when the air is dry . This is possible because the exoperidium is made of several different layers of tissue ; the innermost , fibrous layer is hygroscopic , and curls or uncurls the entire ray as it loses or gains moisture from its surroundings . This adaptation enables the fruit body to disperse spores at times of optimum moisture , and reduce evaporation during dry periods . Further , dry fruit bodies with the rays curled up may be readily blown about by the wind , allowing them to scatter spores from the pore as they roll . 
 Young specimens of A. hygrometricus <a href='got' title='1'><mark>have</mark></a> roughly spherical fruit bodies <a href='null_relcl' title='2'><mark>that</mark></a>typically start their development partially embedded in the substrate . A smooth whitish mycelial layer <a href='uninflect' title='3'><mark>covers</mark></a> the fruit body , and may be partially encrusted with debris . As the fruit body <a href='uninflect' title='4'><mark>matures</mark></a> , the mycelial layer <a href='uninflect' title='5'><mark>tears</mark></a> away , and the outer tissue layer , the exoperidium , <a href='uninflect' title='6'><mark>breaks</mark></a> open in a star @-@ shaped ( stellate ) pattern to form 4 – 20 irregular " rays " . This simultaneously <a href='uninflect' title='7'><mark>pushes</mark></a> the fruit body above ground to reveal a round spore case enclosed in a thin papery endoperidium . The rays open and close in response to levels of moisture in the environment , opening up in high humidity , and closing when the air <a href='drop_aux' title='8'><mark>is</mark></a>dry . This is possible because the exoperidium is made of several different layers of tissue ; the innermost , fibrous layer is hygroscopic , and curls or uncurls the entire ray as it <a href='uninflect' title='9'><mark>loses</mark></a> or <a href='uninflect' title='10'><mark>gains</mark></a> moisture from its surroundings . This adaptation <a href='uninflect' title='11'><mark>enables</mark></a> the fruit body to disperse spores at times of optimum moisture , and reduce evaporation during dry periods . Further , dry fruit bodies with the rays curled up may be readily blown about by the wind , allowing them to scatter spores from the pore as they roll . 
Young specimens of A. hygrometricus got roughly spherical fruit bodies typically start their development partially embedded in da substrate . A smooth whitish mycelial layer cover tdafruit body , and may be partially encrusted with debris . As the fruit body mature , thdaycelial layer tear away , and thedater tissue layer , the daperidium , break open in a star @-@ shaped ( stellate ) pattern to form 4 – 20 irregular " rays " . This simultaneously push the fruit body above ground to reveal a round spore case enclosed in a thin papery endoperidium . The rda open and close in response to levels of moisture in the environment , opening up in high humidity , and closing when the air dry . This is possible because the exoperidium is made of several different layers of tissue ; the indamost , fibrous layer is hygroscopic , and curls or uncurls the entire ray as it lose or gain moisture from its surroundings . dis adaptation enable the frudabody to disperse spores at times of optimum moisture , and reduce evaporation during dry periods . Further , dry fruit bodies with the rays curled up may b readily blown bou by the wind , allowing them to scatter spores from the pore as they roll .