Stephania Erecta, also called Stephania pierrei, is a native of Thailand. The Stephania Erecta plant has a large potato-shaped woody bulb called a caudex that can grow to be seven inches wide.
Use a succulent potting mix for your Stephania. Water retaining soil will cause problems. Use a pot that has drainage holes, as the plant will get root rot if the roots stay wet.
Place the caudex on the top of the potting mix. Make sure the node, or point, is on top. Fill in the potting mix between the caudex and the pot, being careful not to cover the top of the caudex.