7개의 댓글

Annai C.
over 3 years ago

Those are "horns" like tumors. It happens when something irritates them or gets into them. 😑
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exitJiraffe
over 3 years ago

My guess is parasitic. Looks like it’s growing off of the leaf, and not on it. My guess is if you cut those conical parts open, you’d find larva inside. Very cool.
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Mara
over 3 years ago

Yes, they are galls. I had a hackberry tree removed because it was a magnet for woolly aphids and it’s leaves were covered in galls.
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- Rhonda
  over 3 years ago
  
  Yes, galls. It can happen in the woody parts too. The ones I’ve seen on stems, branches, and trunks are rounded and look like huge warts.
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- Mara
  over 3 years ago
  
  Yeah it’s pretty gnarly looking. Even the berries were all deformed. Kinda gross.
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Plant Daddy
over 3 years ago

So fascinating!
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- Mara
  over 3 years ago
  
  These woolly aphids were cool though. If I moved a branch, they would float in the air like pieces of fuzzy white lint.
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Saw this on a hike. Anyone know what this is? Leaves with horns!! | Anything about plants | Planta 커뮤니티