Sepal
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A sepal is a part of the flower of angiosperms. Usually green, sepals typically function as protection for the flower in bud, and often as support for the petals when in bloom. Collectively, the sepal
Tetramerous flower of Ludwigia octovalvis showing petals and sepals
After blooming, the sepals of Hibiscus sabdariffa expand into an edible accessory fruit.
In many Fabaceae flowers, a calyx tube surrounds the petals.
The large calyx of the medlar fruit is the source of its vulgar nicknames.
Whorl (botany)
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In botany, a whorl or verticil is a whorled arrangement of leaves, sepals, petals, stamens, or carpels that radiate from a single point and surround or wrap around the stem or stalk. A leaf whorl cons
Photograph and axial plane floral diagram of Friesodielsia desmoides, showing the whorled pattern of multiple concentric objects.
Leaf whorls on a herbaceous Lilium michiganense
Leaf whorls on a woody tree, Brabejum stellatifolium