Weird green bullseye on my Den Findlayanum . . .
Does anyone what this could be? It appeared rather suddenly - one day after I put it from about 18" from a T5 light, at an angle, to 6" under the light. I moved it back again from the under the lights immediately, when I saw it today. Honestly, it could have been there before the move, but not more than 3 or 4 days ago. The whole leaf turned yellow, except for that odd green circle with a brown "bullseye" in the middle. Another half one at the edge of the leaf. What could it be?
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