part_of part of part of perianth corolla 花冠 (Japanese, exact) PO_GIT:541 PO:0009059 plant_anatomy The corolla (PO:0009059) is part of the perianth (PO:0009058). This definition is based on the complete flower, which has all four whorls. In many species, and in mutants one or more of the whorls may be missing. The corolla (PO:0009059) often functions to attract pollinators. A collective phyllome structure (PO:0025023) that is composed of one or more petals (PO:0009032), comprising the inner whorl of non-reproductive floral organs (PO:0025395) and surrounds the androecium (PO:0009061) and the gynoecium (PO:0009062). corola (Spanish, exact) corollas (exact, plural) corollae (exact, plural) PO_GIT:71 PO_GIT:98 collective phyllome structure