planta-, plant- (Latin: sole of the foot).plantar: 
Pertaining to the sole of the foot.
 
plantigrade: 
1. Walking on the whole soles of the feet, as with a plantigrade animal.  
2. Walking with the whole of the lower surface of each foot on the ground. supplant, supplantation, supplanter: 
1. Literally, "To trip up one's heels, to throw down; to put under the sole of the foot, to trip up".  
2. To take the place of; supersede, especially through force or plotting. 3. To remove or uproot in order to replace with something else. supplanter: 
A person who supplants or something that supplants (or supersedes) a pre-existing situation.
 
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