Messina creeper, coast morning glory, Cairo morning glory, railroad creeper, and mile-a-minute vine, are all names given to the genus Ipomoea cairica. Which also is known as Ipomoea palmata, Ipomoea stipulacea and Ipomoea tuberculata.
Yes! A lot of names for one plant.
I have it growing in my garden and it does indeed grow a "mile-a-minute".
Studies are inconclusive about the alkaloids in I. cairica - one said 0% (Amor-Prats & Harborne, 1993) another said 0.009% (Geetha et al., 1986)
Although varying amounts of ergolines have been discovered in a number of native Ipomoeas (inc. argillicola, costata, diamantinensis, muelleri) I haven't read any papers that give a full breakdown of the individual alkaloids involved. So it's debatable if any are safe to ingest.
It might be included in this paper:
http://www.springerlink.com/content/k332w17327835237/
(did anyone in this forum read that?)
It would be very interesting to learn about people who have actually put this matter to the test. Either by consumption or by extraction of the LSA of I. Cairica.
Thanks/Garden-of-Eden