What kind of vine is this?

What kind of vine is this?

a family friend has many types of plants but never seems to know what they are and sometimes she gives me some. I was told this was a tear drop vine but can't find any info about it. The plant has reddish green leaves, small purple/white flowers and gets little "potatos" on them. I was told to take the pieces they cut off with potatos on them and plant them in the soil and leave the rest in water. The plant this was cut from was several feet long, hanging off a loft. mysteryvine2 thanks:)
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