Now THAT's what we thought we'd bought.

It's a "Yarra", Marra.

It occurred to me that two plants seem to occupy, very nearly, both ends of the alphabet.
On the one hand we have a "Z" with its common name beginning with the letter "A".
"Zantedeschia fall into two main types: hardier outdoor forms, often called arum lilies,......."

On t'other, we have an "A" whose common handle starts with a "Y"
"The common name "yarrow" is normally applied to Achillea millefolium, but may also be used for other species within the genus. ......"

We were sure this was what we'd bought, but when this year's flowers started to emerge they were self-red for at least the 1st week, until the yellow centres (centers) showed face.

Still not 100% on the stacking (Blame the breezes) but good enough for my porpoises.
Unfortunately yesterday's fly, wandering about on top, wasn't prepared to wait 24hrs for my convenience.
;¬))

Odd! This time I CAN see "Preview".