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  2. Whorl (botany) - Wikipedia

    en.wikipedia.org/wiki/Whorl_(botany)

    Leaf whorls occur in some trees such as Brabejum stellatifolium and other species in the family Proteaceae (e.g., in the genus Banksia). In plants such as these, crowded internodes within the leaf whorls alternate with long internodes between the whorls. The morphology of most flowers (called cyclic flowers) is based on four types of whorls:

  3. Phyllotaxis - Wikipedia

    en.wikipedia.org/wiki/Phyllotaxis

    Leaves may also be whorled if several leaves arise, or appear to arise, from the same level (at the same node) on a stem. Veronicastrum virginicum has whorls of leaves separated by long internodes. With an opposite leaf arrangement, two leaves arise from the stem at the same level (at the same node), on opposite sides of the stem. An opposite ...

  4. Myriophyllum verticillatum - Wikipedia

    en.wikipedia.org/wiki/Myriophyllum_verticillatum

    Myriophyllum verticillatum, the whorl-leaf watermilfoil [4] or whorled water-milfoil, [5] is a native to much of North America, North Africa, and Eurasia.It closely resembles another native milfoil, called northern water milfoil (M. sibiricum) [6] Whorled water milfoil is also easily confused with four types of invasive milfoils: Eurasian water milfoil (M. spicatum), Variable water-milfoil (M ...

  5. Ceratophyllum demersum - Wikipedia

    en.wikipedia.org/wiki/Ceratophyllum_demersum

    The leaves are produced in whorls of six to twelve, each leaf 8–40 mm long, simple, or forked into two to eight thread-like segments edged with spiny teeth; they are stiff and brittle. It is monoecious, with separate male and female flowers produced on the same plant. The flowers are small, 2 mm long, with eight or more greenish-brown petals ...

  6. Allocasuarina verticillata - Wikipedia

    en.wikipedia.org/wiki/Allocasuarina_verticillata

    Allocasuarina verticillata, commonly known as drooping sheoak, [3] is a species of flowering plant in the family Casuarinaceae and is endemic to south-eastern Australia. It is a small dioecious tree that has drooping branchlets up to 400 mm (16 in) long, the leaves reduced to scales in whorls of nine to thirteen, the mature fruiting cones 20–50 mm (0.8–2 in) long containing winged seeds 7 ...

  7. Lysimachia quadrifolia - Wikipedia

    en.wikipedia.org/wiki/Lysimachia_quadrifolia

    The long roots are shallow, sometimes spreading along the surface of the ground. It usually has simple, unbranched stems. The leaves are spotted and hairy on the undersides. They are borne in whorls of 3 to 7 around the stem. The flowers grow on long stalks from the leaf whorls.

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