Aloe vera
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Aloe vera is a succulent plant species of the genus Aloe. It is widely distributed, and is considered an invasive species in many world regions.
Teeth on the leaf edges
Spotted forms, also named Aloe vera var. chinensis
Historical image from Acta Eruditorum, 1688
As an ornamental plant
Laxative
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Laxatives, purgatives, or aperients are substances that loosen stools and increase bowel movements. They are used to treat and prevent constipation.
Glycerin suppositories used as laxatives.
Senna plant