| 1. | Sunflowers do not have a pulvinus below their inflorescence.
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| 2. | A pulvinus on a petiolule is called a pulvinulus.
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| 3. | This is the largest pulvinus of any known plant.
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| 4. | Base of petiole swollen to form the pulvinus.
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| 5. | A pulvinus is also sometimes called a geniculum.
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| 6. | The pulvinus is a motor structure consisting of a rod of sclerenchyma surrounded by collenchyma.
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| 7. | The leaf stems measure between 1 and 3 mm long, swollen at the base; often reduced to a pulvinus.
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| 8. | Leaves green, sessile or shortly but distinctly petiolate, petiole with pulvinus, lower side, lower side of leaves mostly lanuginose.
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| 9. | This is followed by an efflux of water, resulting in a sudden change of turgor pressure in the cells of the pulvinus.
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| 10. | At the base of each frond, surrounding the pulvinus like two catcher's mits, is a pair of fleshy stipules.
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