a.) Blossoms have dried & dropped onto "leaf" of plant and caused a blemish?

b.) Damage caused by snails?

c.) Water drops when magnified caused "leaf" to become sun-scorched?

A and C are both possibilities, although I am usually very careful to avoid dropping water on my plants. There are no snails in my neck of the woods though! Can you tell me more about blossoms causing a blemish? How does that happen?? (I'm just curious!)

Thank you so much for your reply!
Heather

The moisture filled blossom sits on the leaf depriving it of air and if the blossom is not removed, the leaf can rot and scar as a result.

That makes sense!

Thanks again!

I've always been told that 'C' is a fallacy, that burning thru a magnified drop of water is hogwash. I'm not the most careful waterer, some of my plants are in a west window w/ direct sun. I'm sure I leave some drops of water on the leaves (except AVs) & that does not happen.

I'm more inclined to think it's from uneven water take-up (maybe pockets of compact, dry soil in the mix/rootball, preventing some of the roots from getting water).

Once in a while, I'll see a damaged segment or 2 like that, if it's on the tip of the branch, I remove it. Otherwise, I ignore it. As long as the rest of the plant is healthy (which looks it), I'd ignore it.