In addition, the kanji '柏' (pronounced kashiwa) originally indicated conifer oriental arbor vitae (konotegashiwa) of the Cupressaceae, and it is completely different from the leaf used for kashiwamochi.
なお、「柏」の字は本来はヒノキ科の針葉樹コノテガシワを指す漢字で、コノテガシワは柏餅に使う葉とは全く異なる。