Nick Gray wrote:

The Morning Glory photo that Pam linked to has ivy shaped leaves rather than
the heart shaped leaves of Ipomoea indica - so wouldn't this make it Ipomoea
hederacea (Ivyleaf Morning Glory)?

Nick, I. indica does have heart-shaped leaves when in the juvenile
phase, but not later when ready to flower. At that point, it develops
typical 3-lobed leaves, somewhat similar to I. hederacea, but then so
do many perennial Ipomoeas. The flowers are the 'give-away', in
indica, they have a rose tint towards the centre. In hederacea, they
are white centrally and the overall colour is much paler.
Dave Poole
Torquay, Coastal South Devon UK
Winter min -2°C. Summer max 34°C.
Growing season: March - November