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Term Definition
Lip The median petal of Orchidaceae which is usually highly modified and different from the two lateral petals, the lip of orchids often plays a crucial role in the plant's pollination; one of the two divisions of a bilabiate corolla, e.g., in the Lamiaceae. Lips of two species of Orchidaceae. Drawing  by B. Angell.
Staminal lip A rim around the adaxial side of the staminal ring. Staminal lip of Bertholletia excelsa
Staminal ring lip In zygomorphic-flowered Lecythis, a flap of tissue that extends beyond the insertion of the stamens on the lateral and anterior parts of the staminal ring. The androecium of a zygomorphic-flowered Lecythidaceae. Photo by C. A. Gracie.