#September2025GallWeek
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ymilesz.bsky.social
It's gall week on iNat, go out and look for weird plant tumors! #September2025GallWeek

www.inaturalist.org/pages/galls
All about galls · iNaturalist
www.inaturalist.org
September 7, 2025 at 10:10 PM
iamowls.bsky.social
One of my favorite galls: cedar apple rust.

#dslr #nikon #September2025GallWeek #gallweek #gymnosporangium #gymnosporangiumjuniperivirginianae
Large, brown gall with orange gelatinous tendrils. A few of the tendrils at the bottom are dried up. The host is a conifer/juniper/arborvitae. Taken in March 2020. Large, brown gall with orange, drooping gelatinous tendrils. The host is a conifer/juniper/arborvitae. Everything is wet. Taken in May 2022.
September 8, 2025 at 6:30 PM
norikonbuchan.bsky.social
Until recently @ymilesz.bsky.social taught me, I didn't know anything about the fascinating synbiotic relationship between fig trees and fig wasps. So I've been wanting to see their work in the wild, and found it on the last day of #September2025GallWeek !
www.inaturalist.org/observations...
Common Fig Wasp (Blastophaga psenes)
Common Fig Wasp from Tyler Island, Walnut Grove, CA, US on September 14, 2025 at 11:07 AM by Noriko Ito. On common fig Host observation: https://www.inaturalist.org/observations/313985713 (Last pho...
www.inaturalist.org
September 15, 2025 at 6:48 PM
iamowls.bsky.social
Probably the prettiest gall I've seen so far (at least, to me): larger empty oak apple wasp.

#dslr #nikon #September2025GallWeek #gallweek #amphibolips #amphibolipsquercusinanis
Large, roundish, pale yellowish green gall with many, small purple spots. The host is an oak. Taken in May 2021.
September 9, 2025 at 7:28 PM
iamowls.bsky.social
Another neat gall: spiny witch hazel gall aphid.

#dslr #nikon #September2025GallWeek #gallweek #hamamelistes #hamamelistesspinosus
Roundish, yellowish green gall covered in conical spines. The host is common witch hazel. Taken in October 2021. Roundish, yellowish green galls covered in sometimes curved, conical spines. The host is common witch hazel. Taken in October 2021.
September 13, 2025 at 1:08 PM
iamowls.bsky.social
Last gall for Gall Week: blackberry seed gall wasp.

#dslr #nikon #September2025GallWeek #gallweek #diastrophus #diastrophuscuscutaeformis
Many roundish, reddish purple galls covered in bristley spines that are clustered together. Most of the galls have a hole. The host is unknown, probably a rubus. Taken in March 2021.
September 14, 2025 at 6:55 PM
iamowls.bsky.social
3 other galls that are commonly found on goldenrod: goldenrod bunch gall midge, giant goldenrod bunch gall midge, and goldenrod brussels sprout gall fly.

#dslr #nikon #September2025GallWeek #gallweek #rhopalomyia #rhopalomyiasolidaginis #rhopalomyiacapitata #procecidochares #procecidocharesatra
Goldenrod bunch gall midge: bunched/rosette gall made from leaves. The host is goldenrod. Taken in September 2020. Giant goldenrod bunch gall midge: bunched/rosette gall made from many leaves. The host is goldenrod. Taken in July 2021. Goldenrod brussels sprout gall fly: bunched/rosette gall made from leaves. The host is goldenrod. Taken in September 2020.
September 12, 2025 at 9:33 PM
iamowls.bsky.social
These galls helps me recognize poison ivy: poison ivy leaf mite.

#dslr #nikon #September2025GallWeek #gallweek #aculops #aculopsrhois
Many small, pink and green bumpy and roundish galls. The host is poison ivy. Taken in July 2022. Many small, pink bumpy and roundish galls. The host is poison ivy. Taken in June 2022. Many small, pink and green bumpy and roundish galls. The left leaf is almost completely covered in galls. The host is poison ivy. Taken in June 2022. Many small, pink and green bumpy and roundish galls. The host is poison ivy. Taken in June 2022.
September 10, 2025 at 6:20 PM
iamowls.bsky.social
These galls make neat circles on their host: carbonifera goldenrod gall midge.

#dslr #nikon #September2025GallWeek #gallweek #asteromyia #asteromyiacarbonifera
Flat, circular, white galls with a thin navy blueish ring near the edge. The host is goldenrod. Taken in September 2022. 4 flat, circular, whiteish galls with a thick blue purple ring near the edge and a blue purple center. The host is goldenrod. There is a thick, yellowish green ring around the galls. Taken in July 2022. Flat, circular, white galls with a thin navy blueish ring near the edge and a navy blueish center. The host is goldenrod. Taken in September 2021.
September 11, 2025 at 5:04 PM