Phylloxera caryaecaulis
Hosts: Carya glabra, ovata
[Phylloxera caryaemagna has previously been considered a synonym of this gall, and the two are very similar in appearance. Dr Hamilton notes in couplets 12 and 13 of her first key (page 115 of the pdf), that P caryaemagna is pubescent and spongy, while caryaecaulis has hard walls and a glabrous exterior.]
Globular and smooth, hard, pale yellowish-green with a hint of crimson, diameter 5.0–25.0 mm; occurs on petioles with an irregular opening or along mid-vein of leaves with a slit-like opening below.
Range: AR, SC
”- Fredericka Blair Hamilton: (2019) Species Diversity of Hickory-feeding Phylloxerans (Hemiptera: Phylloxeridae) in the U.S.©