Cypress Vine

Ipomoea sloteri - note significantly broader lobes in relation to I.quamoclit http://davesgarden.com/guides/pf/showimage/258332/ Ipomoea sloteri - developing seedpod http://www.projectnoah.org/spottings/6539807 Ipomoea x multida has synonym status only in relation to Ipomoea sloteri as Ipomoea x multifida was a sterile diploid hybrid whereas Ipomoea sloteri is a fertile tetraploid Ipomoea quamoclit - note very finely divided leaves http://davesgarden.com/guides/pf/showimage/295445/

P.S.- The last photo shows a partially reflexed pedicel which is characteristic of Ipomoea sloteri...

This is Ipomoea sloteri as the leaves are clear enough and Ipomoea quamoclit has much finer divided foliage...

I think Alice is right, a mixture of two plants both of the morning glory family. the flower looks like a cardinal creeper you can see the smaller leaves on photos 1 & 3. The bigger leaves, seems to belong to a variety of sweet potato.

I think he has two things mixed together.

Check out this Ipomea...not sure because of the foliage http://www.floridata.com/ref/I/ipom_qua.cfm