Cannella (lit: "Cinnamon") is a yellow pony with butterflies as her symbol. She appears in late advertisements as a dark yellow pony (see pics at the bottom here) with WHITE hair (not due to fading) and dark orange symbol, but a rarer golden-haired version exists as well and chances are this one is the actual first issue. In the advertisement from 1984, in fact, although the ponies are *drawed* and not photograhped, Cannella is portraied as a yellow-haired pony.
Another version of her exists, in which she is brown-bodied and has pink butterflies as her symbol. Personally I am reluctant to consider her a Cannella variation, since this brown pony was actually sold with an issue of the Stable instead of Limone: she is likely to be a different character.