Wow, but I'd like a better look at that one.
I want to ask if you've sneezed recently, but only in humor...
There are fungi that look like goo, but I do not think that that
is one of those. (Witches Butter)
It is more likely the effect of leaves laying on each other....respiration.
Good luck,
JD
Godbless you. Wait you didn't sneeze?
Mmm witches butter.
Usually named for the yellow "troll-cat" vomit appearance. A type of slime mold that usually feeds on other microbeasties. I had it twice in a month in my backyard. Amazing how it moves in a days time.
Honey mushroom on the other hand can be a parasitic fungi, wide array of color. But usually eats hard wood/bark/old park benches.
That looks like early stage gummosis we in the south east get on fruiting/citrus plants. If the spot turns rust color and or the stem to the leaf splits and oozes..
@KryptoBud said "vpd" but a cup'o'joe worth of Google and I can't find anything resembling your snot-like exude in descriptions or images. Maybe someone knowledgeable on brix can chime in on if high sugar level can make it look like that. I do remember some sappy looking trimming pix before.
Why does this stuff interest me? If you trim it off, can you put in a ziplock bag and take a photo of it 24hrs later?
Edit:
So a spittlebug has a different name.. Interesting.