Does that account for the slightly different colors? Or are they really different?

Are these two pictures of the same cultivar? Can color and form really vary this much? Or are they different?

Are these two pictures of the same cultivar? Can background color make this much apparent difference? Or are they really different?

Are these two pictures of the same cultivar, merely taken under different conditions? Or are they different?

Scroll down for the answers or back up to study the photos further.

Row #1: The photo on the left is a yellow variant of I. stolonifera. The one on the right is Turkish Topaz. The flowers look very much alike, but in the garden there's little danger of confusing the two because Turkish Topaz is much shorter.

Row #2: Both photos are of Simply Luscious. The left was taken when the flower first opened. The one on the right was taken on the second day, after the flower had fully expanded.

Row #3: The photo on the left is Giant Mohr, parentage unknown. The one on the right is William Mohr, Giant - a sport of William Mohr. The similarity of both appearance and names has caused considerable confusion over the years.

Row #4: Both photos are of Don't Be Shy. It is not unusual for the size and shape of arilbred signals to vary with growing conditions - even weather.