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
Bract
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In botany, a bract is a modified or specialized leaf, associated with a reproductive structure such as a flower, inflorescence axis or cone scale. Bracts are usually different from foliage leaves in s
Whorl (botany)
…except in plant species with very short internodes. Genera with species having whorled leaves include Galium, Nerium, Elodea, and Lilium. Leaf-like bracts may also be whorled (as in Trillium, e.g.). Leaf whorls occur in some trees such as Brabejum stellatifolium and other species in the family Proteaceae…
Papery (upper) and leafy bracts on Rhinanthus minor (hay rattle). All the "leaves" in this image are bracts.
The yellow bracts of Castilleja levisecta press tight against the stem.
The bracts of Bougainvillea glabra, differ in colour from leaves and attract pollinators.
Bracts along a banana flower stalk surround rows of flowers