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Very tentative ID. Can't remember seeing this.

Bur oak

Hidden cells in Lactuca sp. stem (probably biennis). Collected.

On solidago in a beaver meadow.

Seems older due to coloration. On a beaked hazel tree.

On Eutrochium maculatum after dark in degraded wet prairie near shrub swamp.

Paper birch.

Cryptic bur oak acorn cap gall.

Compass plant petiole

Same tree as here: https://www.inaturalist.org/observations/92896318
Quercus rubra/ellipsoidalis

Quercus rubra/ellipsoidalis

?

Emerged from hidden bur oak acorn cap similar to https://www.inaturalist.org/observations/195427761

Best guessing on this ID. I think the host is Androsace occidentalis, but not 100% sure.

emerged from bur oak acron cap similar to https://www.inaturalist.org/observations/195427761.

On Helianthus maximiliani in young prairie restoration. Seems to be some sort of bunch gall?

cow parsnip stem. Likely parasitized by Copidosoma Sosares

prickly wild rose.

S. Humilis humilis host.

Salix sp. host.

Stunted Bur oak acorn cap with exit hole and hidden cell.

All over the ground half buried. Bur, n. Pin, and n. Red oak all abundant.

Bur oak. Collected

Bur oak acorn cap. Collected.

Q. rubra.

Rosa blanda host.

@guidingguida
Alder gall of some kind, appears to be on a catkin

leaf mine on Uvularia grandiflora(?)
Host in case ID is wrong: https://www.inaturalist.org/observations/130987899

Wild plum

witch-hazel

Maybe two species? On sapling regrowth (I think it was cut back at one point, although I don't know why that would be). I believe this is Bitternut Hickory.

quaking aspen host.

Q. rubra host.

Q. rubra host.

Bur oak host. Seems to match this one https://www.gallformers.org/gall/3258??

Bur oak host. Small deformed acorn. Swelling on the inside of cap was quite obvious. Preserved in alcohol. 12/31/23 Sample 9.

P. pensylvanica host.

Symphyotrichum (laeve?) host.

Rhizoplaca host.

s. humilis host. On about 50% of the buds on this plant.

on Quercus alba

s. humilis host.

q. rubra host. looks to be two different galls, both protrude equally from the top. One is “disk” shaped on the bottom and one is “bead” shaped on bottom. Idk if they’re the same sp or not?

Salix (meadow willow?) host.

P. simplex host.

Prunus americana

Signs of fasciation

In bluff prairie/savanna. With fasciation.

Carya cordiformis

Carya cordiformis

Collected.

S. hispida host.

S. hispida host. 7 galls seen in area.

Thought I got a picture of the underside, but I guess not. Each one of these leaf blotches had rust spores that were brownish. Fringed loosestrife host.

Large (<1 in L) light detachable gall, pointed at end, attached to leaf of small Quercus regrowth (I assumed rubra but quite possibly ellipsoidalis). Photos 6-8 are a second, much smaller gall.

American red raspberry host.

C2020

on what we think was Elm-leaved Goldenrod