Pemphigus p-fremontii-midrib-gall
The inducer of this gall is unknown or undescribed.
Detachable: integral
Color: yellow, green
Texture: hairless
Abundance:
Shape: globular
Season: Summer, Spring
Related:
Alignment: integral
Walls: slit
Location: lower leaf, leaf midrib
Form:
Cells:
Possible Range:i
Common Name(s):
Synonymy: 
Our ID Notes may contain important tips necessary for distinguishing this gall from similar galls and/or important information about the taxonomic status of this gall inducer.
Plant Galls of the Western United States
“
Pemphigus sp. B
Midrib-gall aphid
[Page 64; plates 43 & 44]
Hosts: Populus fremontii
This aphid induces large, globular galls that protrude from the ventral midrib of Fremont cottonwood leaves.
”- Russo, Ronald A. : (2021) Plant Galls of the Western United States©
Further Information:
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See Also:
Unless noted otherwise in the ID Notes, observations of this gall are collected in the Observation Field Gallformers Code with value p-fremontii-midrib-gall on iNaturalist. You can view them here:
