Plural form of convolvulus, referring to multiple individual plants or specimens of the convolvulus genus.
From convolvulus plus the English plural suffix -es, added because the singular form ends in -s, following standard English pluralization rules.
English plural suffixes tell a story—'convolvuluses' shows this is originally a Latin word that English adopted, just like we say 'cactuses' and 'platypuses' instead of purely Latin plurals!
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