Of or relating to ivy (Hedera); resembling ivy in structure or growth pattern.
From Latin 'hedera' (ivy) plus the suffix '-al' (relating to). This botanical adjective provides another way to express ivy-like characteristics in scientific language.
Hederal and hederaceous are basically synonyms, but 'hederal' is older and comes from more direct Latin. You can see how English botanical terminology lets you combine the same root in different ways to create subtle variations in scientific meaning.
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