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Mystery Photo

Do you recognize this phenomenon? Hint: it is a crab apple leaf. Submit your mystery solution under “Comments” on the Naturally Curious blog ( It will be solved on Friday’s post!

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8 responses

  1. Possibly a crab apple seed that has started to sprout on the leaf; water having pooled there?

    September 20, 2021 at 9:03 am

  2. Roseanne Saalfield

    Cedar apple rust

    September 20, 2021 at 9:36 am

  3. Cedar apple rust; fungus

    September 20, 2021 at 9:39 am

  4. Dorian Gossy

    Apple leaf rust

    September 20, 2021 at 9:39 am

  5. Alice

    I’m curious to find out!

    September 20, 2021 at 10:00 am

  6. Cedar-apple rust; much smaller and less dramatic than the form on cedar but same color.

    September 20, 2021 at 10:41 am

  7. Stein

    Cedar-Apple Rust from a Google search – but I’m curious to learn more about it. It’s very cool looking….

    September 20, 2021 at 6:30 pm

  8. Some kind of insect made it’s home there and left behind a parasite! 🙂 ❤

    September 21, 2021 at 10:56 pm

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