Antistrophus m-lindleyi-basal-stem-gall

The inducer of this gall is unknown or undescribed.
Family: Cynipidae | Genus: Antistrophus
Hosts: Microseris lindleyi
Detachable: integral
Color: red, white, green
Texture: hairy
Abundance:
Shape: globular
Season: Summer
Related:
Alignment: integral
Walls: thick
Location: underground (roots+), stem
Form: abrupt swelling
Cells:
Possible Range:i
Common Name(s):
Synonymy:
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Field Guide to the Herb and Bramble Gall Wasps of North America
“

Presumed Antistrophus sp.
Silverpuff basal stem gall wasp

Host: Lindley’s silverpuff (Uropappus lindleyi).

Gall location: At the base of the stem.

Description: A spherical swelling, often with dense felt-like pubescence. Greenish to reddish, and apparently around 1-2 centimeters in diameter.

Range: California.

The silverpuff stem gall wasp (see page 23) induces galls on a closely-related host plant, but the silverpuff basal stem gall wasp appears rather distinct, particularly in its location on the host plant and the outer pubescence. The inducer of this gall is unknown, but it is probably a gall wasp closely related to the silverpuff stem gall wasp.

”

- Louis Nastasi, Charles Davis: (2022) Field Guide to the Herb and Bramble Gall Wasps of North America©

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Unless noted otherwise in the ID Notes, observations of this gall are collected in the Observation Field Gallformers Code with value m-lindleyi-basal-stem-gall on iNaturalist. You can view them here:
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