The Collaborative International Dictionary
Catapetalous
Catapetalous \Cat`a*pet"al*ous\, a. [Pref. cata + petalous.] (Bot.) Having the petals held together by stamens, which grow to their bases, as in the mallow.
Wiktionary
catapetalous
a. (context botany English) Having the petals held together by stamens, which grow to their bases, as in the mallow.