Multitudes of fluffy white protrusions extending out into black, pill-shaped caps. A 3-4 millimeters, growing out of living green leaves near the ground as well as brown, dried leaves on the ground. Growing from stem AND leaf itself.
On the underside of an American Chestnut leaf.
on American Chestnut leaf
白尾紅蚜 Urolcueon formosanum
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