Calystegia

noun
Cal·y·ste·gia | \ˌkaləˈstējēə\

Definition of Calystegia 

: a small genus of twining or prostrate perennial herbs closely related to and by some included in Convolvulus but distinguished by the large bracts below the calyx

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History and Etymology for Calystegia

New Latin, irregular from calyx + Greek stegē roof (from stegein to cover) + New Latin -ia

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