Pan ax ). ▁This ▁is ▁also ▁reflected ▁in ▁its ▁formerly ▁used ▁genus ▁name ▁A can th op an ax ▁meaning ▁" th orn y ▁g ins eng ". ▁The ▁word ▁" E le uther oc oc cus ," ▁from ▁Greek , ▁means ▁" free - ber ried ." ▁ ▁The ▁European ▁Medic ines ▁Agency ▁has ▁concluded ▁that ▁there ▁is ▁ins u fficient ▁evidence ▁to ▁demonstrate ▁the ▁effic acy ▁of ▁Ele uther oc oc cus ▁for ▁any ▁clin ical ▁condition . ▁ ▁N aming ▁The ▁Chinese ▁mater ia ▁med ica ▁in ▁question ▁() ▁▁ ▁may ▁design ate ▁a ▁number ▁of ▁species . ▁But ▁the ▁plant ▁now ▁given ▁the ▁common ▁name ▁w uj ia ▁in ▁China ▁is ▁specifically ▁E . ▁g rac il ist yl us , ▁and ▁according ▁to ▁one ▁source , ▁the ▁genu ine ▁cru de ▁drug ▁must ▁come ▁from ▁this ▁species , ▁and ▁C . ▁sp inos um ▁is ▁only ▁a ▁substitute . ▁ ▁The ▁Japanese ▁name ▁ ▁bor rows ▁directly ▁from ▁the ▁Chinese ▁name , ▁and ▁refers ▁somewhat ▁broad ly ▁to ▁several ▁plants ▁in ▁the ▁genus . ▁A ▁▁ 1 0 th ▁century ▁her b ology ▁text , ▁Hon z ō ▁w amy ō ▁( ), ▁ ▁introduced ▁the ▁Chinese ▁w uj ia ▁as ▁an ▁her b ▁to ▁be ▁pron ounced ▁mu - ko - gi ▁( ), ▁refers ▁specifically ▁to ▁E . ▁sie bold ian us ▁( J apan ese ▁name : ▁h ime - uk og i ). ▁( See ▁# Spe cies ▁list ▁below ). ▁ ▁The ▁tax