Probably Rust, Bean Rust. Check out the pics below for comparison and this article for detailed info. Plant resistant cultivars and use fungicides. Dave Here is a link that might be useful: Bean rust pics

Saturn. I've looked and re-looked at your Syngonium. I see one, brown leaf. Are there others? If only one or two, no need to worry. Although Syngoniums should not be set in direct summer sun, during winter, variegated species, 'yours is slightly variegated,' need more light than non-variegated. Watering. Once you see new growth, Syns needs regular watering..During non-growing seasons, soil should dry in-between drinks. Would you happen to know if your Synonium is a miniature? Colors and leaf shape look similiar to a mini HD once had for sale. Soil in clay dries much quicker than ceramic or plastic, but room temp/humidity/pot size plays a major role, too. Do you water once a week for convenience or know for a fact soil is ready for a drink? Anyway, your Syngonium looks fine. One to a few brown leaves this time of year is natural.. Toni

I'm having a problem with some of my leaves not unrolling. It's almost as if the leaves are glued because they are so tightly rolled. When I try to unroll them, I have to pry the edges loose and then there's usually dirt or some kind of grit inside. What is a canna leaf roller and what are you spraying them with? I'm seeing this problem in several locations in my yard but it doesn't appear to be widespread among the many cannas I have.

You might want to post this on the main hydrangeas thread, where it will be seen by more people who might be able to help. Wish I could, but I'm still new to mine, too.