呈纽扣状圆板形，表面密被灰棕色或灰绿色绢状茸毛，自中间向四周呈辐射状排列的药材是

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SQL Error: select id,body,options from ***_enewstiku where sourceid='26253' and id < 2197473 and id<>'2197473' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='26253' and id > 2197473 and id<>'2197473' order by id asc limit 5