| Anthers are introrse and fused longitudinally through many papillae, in such a way that they form a cuff around the ovary. |
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| Five introrse anthers are united to form a cylinder around the style while the separate filaments are attached to the base of the corolla tubes. |
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| The ten stamens are introrse, and when elongate the anthers group in the upper part of the flower. |
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| These pollen sacs can face outward, in which case the stamens are called extrorse, or inward, in which case the stamens are called introrse. |
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| Stamens number eight to twelve, are opposite the sepals and petals, and have introrse, dorsifixed anthers that dehisce by longitudinal slits. |
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