續一切經音義 5.72

5.72

躑躅葉（上呈戟反次重錄反藥草名也本草云羊躑躅也葉花皆有大毒三月採花其花色黃亦有五色者羊誤食其花葉躑躅而死因以為名古今正字躑躅行不前也二字並從足鄭蜀皆聲也）。

Leaves of sheep's rhododendron (躑躅葉) (the first character is cheng + ji fan [zhí], the next is zhong + lu fan [zhú]; the name of a medicinal herb. The Materia Medica [Bencao] says: "It is sheep's rhododendron [羊躑躅]. Both its leaves and flowers are highly toxic. The flowers are gathered in the third month; their colour is yellow, but there are also five-coloured ones. When sheep mistakenly eat its flowers and leaves, they stumble about [躑躅] and die, hence the name." Gujin zhengzi: "躑躅 means unable to advance in walking." Both characters are formed with the zu [foot] radical, with zheng and shu as their phonetics).