Not sure about the leaves...some looks like normal aging and/or early sunburn...maybe snails (leaves with light-colored marks) The dark markings on the flowers looks like mold. White flowers always look the worst ...because they're white. Wet flowers or very humid conditions can lead to this problem inside or outside. I lightly spray flowers periodically with RD-20 (Physan-20) and problem gone...especially helpful for plants summering outside under trees that can "drop" all kinds of nastiness on your plants!
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