Nothing (acceptable image because the greater tubercle is in profile) (acceptable image because the greater tubercle is in profile.)
In anatomy, a tubercle is any spherical nodule, tiny elevation, or warty protrusion found on the surface or internal organs of a plant or an animal. The word tubercle is derived from the Latin word tuberculum, which means "lump." A tubercle is typically a projection that resembles a wart, however depending on the family of plants or animals it is used to describe, it might have a slightly different connotation.
It refers to a spherical nodule, tiny prominence, or warty protrusion seen on the lip in the case of some orchids and cacti. They go by the name podaria as well (singular podarium). It is used to describe the wart-like excrescences that can be found on the roots of some members of the pea family.
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