CLOSED: Weird dark dots on back of hibiscus leaves

Vidor, TX

Hi everyone,
I noticed these really odd spherical dark colored dots on the back of the leaves. They are slightly raised, and not part of the leaf. I think they may be some kind of egg.
Any help with ID &/ treatment would be appreciated!

Thank you!

Thumbnail by Leximinton
Minot, ND

These look like fungal spores (see for an image) to me - do you by any chance use wood chip or similar mulch in or around your flower beds?

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