Harmandiola p-tristis-leaf-spot
The inducer of this gall is unknown or undescribed.
Family: Cecidomyiidae | Genus: Harmandiola
Hosts: Populus trichocarpa / Populus tristis
Detachable: integral
Color: green
Texture: hairless
Abundance:
Shape:
Season: Summer, Spring, Fall
Related:
Alignment: integral
Walls:
Location: upper leaf, between leaf veins
Form: leaf spot
Cells: not applicable
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.
Gallformers ID Notes
“
An exposed larva on the lower side of the leaf lamina of Populus tristis causing a circular green spot and a slight raised papilla on the upper side. Observed from southern CA up to Washington. There may be multiple generations per year; fresh galls with larvae have been seen in May and September.
This gall can only be distinguished from the similar p-balsamifera-leaf-gall by host ID. There are places where both hosts occur, and distinguishing the two plants can be difficult. It is possible that the two midges are in fact conspecific.
”- Gallformers Contributors: (2024) Gallformers ID Notes©
Further Information:
Pending...
See Also:
Unless noted otherwise in the ID Notes, observations of this gall are collected in the Observation Field Gallformers Code with value p-tristis-leaf-spot on iNaturalist. You can view them here:
