So, I had previously resigned myself to never figuring out what the fantastic purple flower was, when lo and behold, two separate sources came up today! Grad school buddy Jeff was perusing his National Geographic magazine and they just so happened to have a picture of it, and the Botanic Garden people actually emailed me back, how awesome is that? Anyways, here it is:
Passion Flower Family – Passifloraceae. Common name – Grenadilla, latin name – Passiflora quadrangularis.